diff --git a/lib/transfer.c b/lib/transfer.c
index 4aa94364b..370734a13 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;