diff --git a/client/mysqltest.c b/client/mysqltest.c
index 77736fc1fcc..903a4b85e1c 100644
--- a/client/mysqltest.c
+++ b/client/mysqltest.c
@@ -60,6 +60,7 @@
 #include <sys/stat.h>
 #include <violite.h>
 #include <regex.h>                        /* Our own version of lib */
+#include <stdlib.h>
 #define MAX_QUERY     131072
 #define MAX_VAR_NAME	256
 #define MAX_COLUMNS	256