diff --git a/ext/jack/gstjack.c b/ext/jack/gstjack.c
index 65544f1f86..02696901b9 100644
--- a/ext/jack/gstjack.c
+++ b/ext/jack/gstjack.c
@@ -18,10 +18,10 @@
 */
 
 #include <stdlib.h>
+#include <string.h>
 #include "gstjack.h"
 #include <gst/audio/audio.h>
 
-
 /* TODO:
    
    this element is still nonfunctional