diff --git a/lib/nonblock.c b/lib/nonblock.c
index 1447c877d..189fc5dea 100644
--- a/lib/nonblock.c
+++ b/lib/nonblock.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -77,7 +77,7 @@ int curlx_nonblock(curl_socket_t sockfd,    /* operate on this */
 
   /* Amiga */
   long flags = nonblock ? 1L : 0L;
-  return IoctlSocket(sockfd, FIONBIO, flags);
+  return IoctlSocket(sockfd, FIONBIO, (char *)&flags);
 
 #elif defined(HAVE_SETSOCKOPT_SO_NONBLOCK)