diff --git a/demos/graph/grobjs.c b/demos/graph/grobjs.c
index 8a34dfd0b..f2bdd2b76 100644
--- a/demos/graph/grobjs.c
+++ b/demos/graph/grobjs.c
@@ -1,6 +1,6 @@
 #include "grobjs.h"
 #include <stdlib.h>
-#include <memory.h>
+#include <string.h>
 
   int  grError = 0;