diff --git a/lib/transfer.c b/lib/transfer.c
index 4aa94364b5097dc351b5d645523494a6ab621ae0..370734a134db3d9e40f044b1d9e70fa3901a32df 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -285,7 +285,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
 
   curl_socket_t fd_read;
   curl_socket_t fd_write;
-  curl_socket_t select_res;
+  int select_res;
 
   curl_off_t contentlength;