1 files changed, 5 insertions, 1 deletions
diff --git a/slirp/misc.c b/slirp/misc.c
index 581db880d9..0137e75ed1 100644
--- a/slirp/misc.c
+++ b/slirp/misc.c
@@ -777,7 +777,11 @@ void
 fd_nonblock(int fd)
 {
 #ifdef FIONBIO
-	int opt = 1;
+#ifdef _WIN32
+        long opt = 1;
+#else
+        int opt = 1;
+#endif
 
 	ioctlsocket(fd, FIONBIO, &opt);
 #else