diff --git a/ext/mad/gstmad.c b/ext/mad/gstmad.c
index 1f4119d7ae..92b825d10d 100644
--- a/ext/mad/gstmad.c
+++ b/ext/mad/gstmad.c
@@ -35,6 +35,7 @@
 #include "config.h"
 #endif
 
+#include <stdlib.h>
 #include <string.h>
 #include "gstmad.h"
 #include <gst/audio/audio.h>