diff --git a/src/rngs/os.rs b/src/rngs/os.rs
index f459b235..f442ddfc 100644
--- a/src/rngs/os.rs
+++ b/src/rngs/os.rs
@@ -413,11 +413,13 @@ mod imp {
     const NR_GETRANDOM: libc::c_long = 4353;
     #[cfg(target_arch = "mips64")]
     const NR_GETRANDOM: libc::c_long = 5313;
+    #[cfg(target_arch = "sparc")]
+    const NR_GETRANDOM: libc::c_long = 347;
     #[cfg(not(any(target_arch = "x86_64", target_arch = "x86",
                   target_arch = "arm", target_arch = "aarch64",
                   target_arch = "s390x", target_arch = "powerpc",
                   target_arch = "powerpc64", target_arch = "mips",
-                  target_arch = "mips64")))]
+                  target_arch = "mips64", target_arch = "sparc")))]
     const NR_GETRANDOM: libc::c_long = 0;
 
     fn getrandom(buf: &mut [u8], blocking: bool) -> libc::c_long {