diff --git a/src/bindgen/parser.rs b/src/bindgen/parser.rs
index ebb3935..5b19550 100644
--- a/src/bindgen/parser.rs
+++ b/src/bindgen/parser.rs
@@ -215,7 +215,10 @@ impl<'a> Parser<'a> {
             self.cache_expanded_crate.get(&pkg.name).unwrap().clone()
         };
 
-        self.process_mod(pkg, None, None, &mod_items, 0)
+        self.process_mod(
+            pkg, None, None, &mod_items, 0, /* is_mod_rs = */ true,
+            /* is_inline = */ false,
+        )
     }
 
     fn parse_mod(
@@ -254,7 +257,8 @@ impl<'a> Parser<'a> {
 
         let mod_dir = mod_path.parent().unwrap();
 
-        let submod_dir = if depth == 0 || mod_path.ends_with("mod.rs") {
+        let is_mod_rs = depth == 0 || mod_path.ends_with("mod.rs");
+        let submod_dir = if is_mod_rs {
             mod_dir
         } else {
             submod_dir_2018 = mod_path
@@ -264,7 +268,15 @@ impl<'a> Parser<'a> {
             &submod_dir_2018
         };
 
-        self.process_mod(pkg, Some(mod_dir), Some(submod_dir), &mod_items, depth)
+        self.process_mod(
+            pkg,
+            Some(mod_dir),
+            Some(submod_dir),
+            &mod_items,
+            depth,
+            /* is_inline = */ false,
+            is_mod_rs,
+        )
     }
 
     /// `mod_dir` is the path to the current directory of the module. It may be
@@ -272,6 +284,7 @@ impl<'a> Parser<'a> {
     ///
     /// `submod_dir` is the path to search submodules in by default, which might
     /// be different for rust 2018 for example.
+    #[allow(clippy::too_many_arguments)]
     fn process_mod(
         &mut self,
         pkg: &PackageRef,
@@ -279,6 +292,8 @@ impl<'a> Parser<'a> {
         submod_dir: Option<&FilePath>,
         items: &[syn::Item],
         depth: usize,
+        is_inline: bool,
+        is_in_mod_rs: bool,
     ) -> Result<(), Error> {
         debug_assert_eq!(mod_dir.is_some(), submod_dir.is_some());
         // We process the items first then the nested modules.
@@ -298,13 +313,18 @@ impl<'a> Parser<'a> {
             }
 
             if let Some((_, ref inline_items)) = item.content {
+                // TODO(emilio): This should use #[path] attribute if present,
+                // rather than next_mod_name.
                 let next_submod_dir = submod_dir.map(|dir| dir.join(&next_mod_name));
+                let next_mod_dir = mod_dir.map(|dir| dir.join(&next_mod_name));
                 self.process_mod(
                     pkg,
-                    mod_dir,
+                    next_mod_dir.as_deref(),
                     next_submod_dir.as_deref(),
                     inline_items,
                     depth,
+                    /* is_inline = */ true,
+                    is_in_mod_rs,
                 )?;
             } else if let Some(mod_dir) = mod_dir {
                 let submod_dir = submod_dir.unwrap();
@@ -325,11 +345,28 @@ impl<'a> Parser<'a> {
                             match lit {
                                 syn::Lit::Str(ref path_lit) if path.is_ident("path") => {
                                     path_attr_found = true;
-                                    self.parse_mod(
-                                        pkg,
-                                        &mod_dir.join(path_lit.value()),
-                                        depth + 1,
-                                    )?;
+                                    // https://doc.rust-lang.org/reference/items/modules.html#the-path-attribute
+                                    //
+                                    //     For path attributes on modules not inside inline module blocks, the file path
+                                    //     is relative to the directory the source file is located.
+                                    //
+                                    //     For path attributes inside inline module blocks, the relative location of the
+                                    //     file path depends on the kind of source file the path attribute is located
+                                    //     in.  "mod-rs" source files are root modules (such as lib.rs or main.rs) and
+                                    //     modules with files named mod.rs. "non-mod-rs" source files are all other
+                                    //     module files.
+                                    //
+                                    //     Paths for path attributes inside inline module blocks in a mod-rs file are
+                                    //     relative to the directory of the mod-rs file including the inline module
+                                    //     components as directories. For non-mod-rs files, it is the same except the
+                                    //     path starts with a directory with the name of the non-mod-rs module.
+                                    //
+                                    let base = if is_inline && !is_in_mod_rs {
+                                        submod_dir
+                                    } else {
+                                        mod_dir
+                                    };
+                                    self.parse_mod(pkg, &base.join(path_lit.value()), depth + 1)?;
                                     break;
                                 }
                                 _ => (),
diff --git a/tests/expectations/mod_2015.both.c b/tests/expectations/mod_2015.both.c
index 387edf8..a9c3d2d 100644
--- a/tests/expectations/mod_2015.both.c
+++ b/tests/expectations/mod_2015.both.c
@@ -10,3 +10,5 @@ typedef struct ExportMe {
 } ExportMe;
 
 void export_me(struct ExportMe *val);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2015.both.compat.c b/tests/expectations/mod_2015.both.compat.c
index 3d090e5..264f020 100644
--- a/tests/expectations/mod_2015.both.compat.c
+++ b/tests/expectations/mod_2015.both.compat.c
@@ -15,6 +15,8 @@ extern "C" {
 
 void export_me(struct ExportMe *val);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2015.c b/tests/expectations/mod_2015.c
index 7ffa5ee..f67ddcc 100644
--- a/tests/expectations/mod_2015.c
+++ b/tests/expectations/mod_2015.c
@@ -10,3 +10,5 @@ typedef struct {
 } ExportMe;
 
 void export_me(ExportMe *val);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2015.compat.c b/tests/expectations/mod_2015.compat.c
index 1527af6..4f49992 100644
--- a/tests/expectations/mod_2015.compat.c
+++ b/tests/expectations/mod_2015.compat.c
@@ -15,6 +15,8 @@ extern "C" {
 
 void export_me(ExportMe *val);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2015.cpp b/tests/expectations/mod_2015.cpp
index 22b3f70..0259968 100644
--- a/tests/expectations/mod_2015.cpp
+++ b/tests/expectations/mod_2015.cpp
@@ -14,4 +14,6 @@ extern "C" {
 
 void export_me(ExportMe *val);
 
+void from_really_nested_mod();
+
 } // extern "C"
diff --git a/tests/expectations/mod_2015.pyx b/tests/expectations/mod_2015.pyx
index 4398e5d..c8f9cbc 100644
--- a/tests/expectations/mod_2015.pyx
+++ b/tests/expectations/mod_2015.pyx
@@ -12,3 +12,5 @@ cdef extern from *:
     uint64_t val;
 
   void export_me(ExportMe *val);
+
+  void from_really_nested_mod();
diff --git a/tests/expectations/mod_2015.tag.c b/tests/expectations/mod_2015.tag.c
index 01a8d59..42233d4 100644
--- a/tests/expectations/mod_2015.tag.c
+++ b/tests/expectations/mod_2015.tag.c
@@ -10,3 +10,5 @@ struct ExportMe {
 };
 
 void export_me(struct ExportMe *val);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2015.tag.compat.c b/tests/expectations/mod_2015.tag.compat.c
index 097697e..606808c 100644
--- a/tests/expectations/mod_2015.tag.compat.c
+++ b/tests/expectations/mod_2015.tag.compat.c
@@ -15,6 +15,8 @@ extern "C" {
 
 void export_me(struct ExportMe *val);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2015.tag.pyx b/tests/expectations/mod_2015.tag.pyx
index 4838320..35cd4ab 100644
--- a/tests/expectations/mod_2015.tag.pyx
+++ b/tests/expectations/mod_2015.tag.pyx
@@ -12,3 +12,5 @@ cdef extern from *:
     uint64_t val;
 
   void export_me(ExportMe *val);
+
+  void from_really_nested_mod();
diff --git a/tests/expectations/mod_2018.both.c b/tests/expectations/mod_2018.both.c
index 8f0c126..8c48f88 100644
--- a/tests/expectations/mod_2018.both.c
+++ b/tests/expectations/mod_2018.both.c
@@ -16,3 +16,5 @@ typedef struct ExportMe2 {
 void export_me(struct ExportMe *val);
 
 void export_me_2(struct ExportMe2*);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2018.both.compat.c b/tests/expectations/mod_2018.both.compat.c
index 3a64d75..b87a85e 100644
--- a/tests/expectations/mod_2018.both.compat.c
+++ b/tests/expectations/mod_2018.both.compat.c
@@ -21,6 +21,8 @@ void export_me(struct ExportMe *val);
 
 void export_me_2(struct ExportMe2*);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2018.c b/tests/expectations/mod_2018.c
index c653e5f..45def6c 100644
--- a/tests/expectations/mod_2018.c
+++ b/tests/expectations/mod_2018.c
@@ -16,3 +16,5 @@ typedef struct {
 void export_me(ExportMe *val);
 
 void export_me_2(ExportMe2*);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2018.compat.c b/tests/expectations/mod_2018.compat.c
index 64e0e54..2af05c2 100644
--- a/tests/expectations/mod_2018.compat.c
+++ b/tests/expectations/mod_2018.compat.c
@@ -21,6 +21,8 @@ void export_me(ExportMe *val);
 
 void export_me_2(ExportMe2*);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2018.cpp b/tests/expectations/mod_2018.cpp
index 0c2d0b0..4d195ac 100644
--- a/tests/expectations/mod_2018.cpp
+++ b/tests/expectations/mod_2018.cpp
@@ -20,4 +20,6 @@ void export_me(ExportMe *val);
 
 void export_me_2(ExportMe2*);
 
+void from_really_nested_mod();
+
 } // extern "C"
diff --git a/tests/expectations/mod_2018.pyx b/tests/expectations/mod_2018.pyx
index 377db9f..1c79c69 100644
--- a/tests/expectations/mod_2018.pyx
+++ b/tests/expectations/mod_2018.pyx
@@ -17,3 +17,5 @@ cdef extern from *:
   void export_me(ExportMe *val);
 
   void export_me_2(ExportMe2*);
+
+  void from_really_nested_mod();
diff --git a/tests/expectations/mod_2018.tag.c b/tests/expectations/mod_2018.tag.c
index a6df41f..70d9a22 100644
--- a/tests/expectations/mod_2018.tag.c
+++ b/tests/expectations/mod_2018.tag.c
@@ -16,3 +16,5 @@ struct ExportMe2 {
 void export_me(struct ExportMe *val);
 
 void export_me_2(struct ExportMe2*);
+
+void from_really_nested_mod(void);
diff --git a/tests/expectations/mod_2018.tag.compat.c b/tests/expectations/mod_2018.tag.compat.c
index edbd8a1..051cb67 100644
--- a/tests/expectations/mod_2018.tag.compat.c
+++ b/tests/expectations/mod_2018.tag.compat.c
@@ -21,6 +21,8 @@ void export_me(struct ExportMe *val);
 
 void export_me_2(struct ExportMe2*);
 
+void from_really_nested_mod(void);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif // __cplusplus
diff --git a/tests/expectations/mod_2018.tag.pyx b/tests/expectations/mod_2018.tag.pyx
index 4f0e6c1..eb78cb4 100644
--- a/tests/expectations/mod_2018.tag.pyx
+++ b/tests/expectations/mod_2018.tag.pyx
@@ -17,3 +17,5 @@ cdef extern from *:
   void export_me(ExportMe *val);
 
   void export_me_2(ExportMe2*);
+
+  void from_really_nested_mod();
diff --git a/tests/rust/mod_2015/src/nested/mod.rs b/tests/rust/mod_2015/src/nested/mod.rs
index 5347ee6..6a3bd6d 100644
--- a/tests/rust/mod_2015/src/nested/mod.rs
+++ b/tests/rust/mod_2015/src/nested/mod.rs
@@ -1 +1,6 @@
 pub mod other;
+
+mod other3 {
+    #[path = "other4.rs"]
+    mod other4;
+}
diff --git a/tests/rust/mod_2015/src/nested/other3/other4.rs b/tests/rust/mod_2015/src/nested/other3/other4.rs
new file mode 100644
index 0000000..d17fc29
--- /dev/null
+++ b/tests/rust/mod_2015/src/nested/other3/other4.rs
@@ -0,0 +1,2 @@
+#[no_mangle]
+pub unsafe extern "C" fn from_really_nested_mod() { }
diff --git a/tests/rust/mod_2018/src/nested.rs b/tests/rust/mod_2018/src/nested.rs
index e551180..9638758 100644
--- a/tests/rust/mod_2018/src/nested.rs
+++ b/tests/rust/mod_2018/src/nested.rs
@@ -2,3 +2,8 @@ pub mod other;
 
 #[path = "other2.rs"]
 pub mod other2;
+
+pub mod other3 {
+    #[path = "other4.rs"]
+    pub mod other4;
+}
diff --git a/tests/rust/mod_2018/src/nested/other3/other4.rs b/tests/rust/mod_2018/src/nested/other3/other4.rs
new file mode 100644
index 0000000..d17fc29
--- /dev/null
+++ b/tests/rust/mod_2018/src/nested/other3/other4.rs
@@ -0,0 +1,2 @@
+#[no_mangle]
+pub unsafe extern "C" fn from_really_nested_mod() { }