1 files changed, 1 insertions, 1 deletions
diff --git a/vio/viosocket.c b/vio/viosocket.c
index 75d3fc51db1..d34bb13b1bd 100644
--- a/vio/viosocket.c
+++ b/vio/viosocket.c
@@ -843,7 +843,7 @@ static my_bool socket_peek_read(Vio *vio, uint *bytes)
 {
   my_socket sd= mysql_socket_getfd(vio->mysql_socket);
 #if defined(_WIN32)
-  int len;
+  u_long len;
   if (ioctlsocket(sd, FIONREAD, &len))
     return TRUE;
   *bytes= len;