diff --git a/includes/cdefs.h b/includes/cdefs.h
index b04e5b58..c736fd8b 100644
--- a/includes/cdefs.h
+++ b/includes/cdefs.h
@@ -54,6 +54,7 @@
 	do {				\
 		int ignore_return;	\
 		ignore_return = x;	\
+                (void)ignore_return;    \
 	} while (0)
 #endif