diff --git a/src/misc/extra/extraUtilFile.c b/src/misc/extra/extraUtilFile.c
index 497081528..24b74c5b8 100644
--- a/src/misc/extra/extraUtilFile.c
+++ b/src/misc/extra/extraUtilFile.c
@@ -19,6 +19,7 @@
 ***********************************************************************/
 
 #include <limits.h>
+#include <stdlib.h>
 
 #include "extra.h"