diff --git a/rbutil/rbutilqt/utils.cpp b/rbutil/rbutilqt/utils.cpp
index 36da802f78..caeb30a4b5 100644
--- a/rbutil/rbutilqt/utils.cpp
+++ b/rbutil/rbutilqt/utils.cpp
@@ -19,7 +19,7 @@
 
 #include "utils.h"
 
-//#include <cstdlib>
+#include <cstdlib>
 
 #include <QDir>