diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d972e16e47..b28201e6ca 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2014-02-17  Yao Qi  <yao@codesourcery.com>
+
+	* gnu-nat.c (gnu_read_inferior): Change 'copy_count' type to
+	mach_msg_type_number_t.
+	(gnu_write_inferior): Likewise.
+
 2014-02-17  Yao Qi  <yao@codesourcery.com>
 
 	* gnu-nat.c (proc_get_exception_port): Use 'lu' insetad of 'd'
diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c
index 545105f328..e4140e0382 100644
--- a/gdb/gnu-nat.c
+++ b/gdb/gnu-nat.c
@@ -2288,7 +2288,7 @@ gnu_read_inferior (task_t task, CORE_ADDR addr, gdb_byte *myaddr, int length)
   vm_size_t aligned_length =
   (vm_size_t) round_page (addr + length) - low_address;
   pointer_t copied;
-  int copy_count;
+  mach_msg_type_number_t copy_count;
 
   /* Get memory from inferior with page aligned addresses.  */
   err = vm_read (task, low_address, aligned_length, &copied, &copy_count);
@@ -2335,7 +2335,7 @@ gnu_write_inferior (task_t task, CORE_ADDR addr,
   vm_size_t aligned_length =
   (vm_size_t) round_page (addr + length) - low_address;
   pointer_t copied;
-  int copy_count;
+  mach_msg_type_number_t copy_count;
   int deallocate = 0;
 
   char *errstr = "Bug in gnu_write_inferior";