diff --git a/slirp_glue/glib_qemu_stubs.c b/slirp_glue/glib_qemu_stubs.c
index a36bd4b5..99f06245 100644
--- a/slirp_glue/glib_qemu_stubs.c
+++ b/slirp_glue/glib_qemu_stubs.c
@@ -144,7 +144,7 @@ void qemu_set_nonblock(int fd)
 {
 unsigned long non_block = 1;
 
-    ioctlsocket ((SOCKET)fd, FIONBIO, &non_block);         /* set nonblocking */
+    (void)ioctlsocket ((SOCKET)fd, FIONBIO, &non_block);   /* set nonblocking */
 }
 #else
 #include <fcntl.h>
@@ -153,8 +153,8 @@ void qemu_set_nonblock(int fd)
     int f;
 
     f = fcntl(fd, F_GETFL);
-    if (f!= -1)
-        fcntl(fd, F_SETFL, f | O_NONBLOCK);
+    if (f != -1)
+        (void)fcntl(fd, F_SETFL, f | O_NONBLOCK);
 }
 #endif