diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b4acab81fa6..bc69dc5f813 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2014-01-24  Yao Qi  <yao@codesourcery.com>
+
+	* remote.c (remote_write_bytes_aux): Change type of 'len' to
+	ULONGEST.  Don't check 'len' is negative.
+	(remote_write_bytes):  Change type of 'len' to ULONGEST.
+
 2014-01-23  Tom Tromey  <tromey@redhat.com>
 
 	PR python/16485:
diff --git a/gdb/remote.c b/gdb/remote.c
index d8869295af3..15e739472d7 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -6848,7 +6848,7 @@ check_binary_download (CORE_ADDR addr)
 
 static LONGEST
 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
-			const gdb_byte *myaddr, ssize_t len,
+			const gdb_byte *myaddr, ULONGEST len,
 			char packet_format, int use_length)
 {
   struct remote_state *rs = get_remote_state ();
@@ -6865,7 +6865,7 @@ remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
     internal_error (__FILE__, __LINE__,
 		    _("remote_write_bytes_aux: bad packet format"));
 
-  if (len <= 0)
+  if (len == 0)
     return 0;
 
   payload_size = get_memory_write_packet_size ();
@@ -7003,7 +7003,7 @@ remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
    packet.  */
 
 static LONGEST
-remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
+remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len)
 {
   char *packet_format = 0;