diff --git a/tests/memload.c b/tests/memload.c
index b02b1158d..a37c6af28 100644
--- a/tests/memload.c
+++ b/tests/memload.c
@@ -18,6 +18,8 @@
  *
  */
 
+#include <stdlib.h>
+
 #include <hamlib/rig.h>
 
 #ifdef HAVE_XML2