diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9b1fa3fa1b..0622214370 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2013-09-02  Pierre Muller  <muller@sourceware.org>
+
+	* windows-nat.c (windows_xfer_memory): Fix compilation failure
+	by use of plongest function.
+
 2013-09-02  Tristan Gingold  <gingold@adacore.com>
 
 	* NEWS: Add entry mentioning support for native Windows x64
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 2ffaad4368..28705f7fd4 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -2327,8 +2327,8 @@ windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
 
   if (writebuf != NULL)
     {
-      DEBUG_MEM (("gdb: write target memory, %d bytes at %s\n",
-		  len, core_addr_to_string (memaddr)));
+      DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
+		  plongest (len), core_addr_to_string (memaddr)));
       success = WriteProcessMemory (current_process_handle,
 				    (LPVOID) (uintptr_t) memaddr, writebuf,
 				    len, &done);
@@ -2337,8 +2337,8 @@ windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
     }
   else
     {
-      DEBUG_MEM (("gdb: read target memory, %d bytes at %s\n",
-		  len, core_addr_to_string (memaddr)));
+      DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
+		  plongest (len), core_addr_to_string (memaddr)));
       success = ReadProcessMemory (current_process_handle,
 				   (LPCVOID) (uintptr_t) memaddr, readbuf,
 				   len, &done);