diff --git a/tools/gstreamer-register.c b/tools/gstreamer-register.c
index 04d31d953f..e008e4f04d 100644
--- a/tools/gstreamer-register.c
+++ b/tools/gstreamer-register.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <gst/gst.h>
 
 extern gboolean _gst_plugin_spew;