diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index bc69dc5f813..504858d6dc3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2014-01-24  Yao Qi  <yao@codesourcery.com>
+
+	* remote.c (remote_read_bytes): Change type of len to ULONGEST.
+	* corelow.c (get_core_siginfo): Likewise.
+
 2014-01-24  Yao Qi  <yao@codesourcery.com>
 
 	* remote.c (remote_write_bytes_aux): Change type of 'len' to
diff --git a/gdb/corelow.c b/gdb/corelow.c
index d4c1c16c25b..2d4a7198774 100644
--- a/gdb/corelow.c
+++ b/gdb/corelow.c
@@ -649,7 +649,7 @@ add_to_spuid_list (bfd *abfd, asection *asect, void *list_p)
    the to_xfer_partial interface.  */
 
 static LONGEST
-get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, LONGEST len)
+get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, ULONGEST len)
 {
   asection *section;
   char *section_name;
diff --git a/gdb/remote.c b/gdb/remote.c
index 15e739472d7..7297df01e75 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -7039,7 +7039,7 @@ remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len)
    target_xfer_error' value) for error.  */
 
 static LONGEST
-remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
+remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len)
 {
   struct remote_state *rs = get_remote_state ();
   int max_buf_size;		/* Max size of packet output buffer.  */
@@ -7047,7 +7047,7 @@ remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
   int todo;
   int i;
 
-  if (len <= 0)
+  if (len == 0)
     return 0;
 
   max_buf_size = get_memory_read_packet_size ();