diff --git a/src/columns/ColUDA.cpp b/src/columns/ColUDA.cpp
index f191a2d63..e8a15d706 100644
--- a/src/columns/ColUDA.cpp
+++ b/src/columns/ColUDA.cpp
@@ -33,6 +33,7 @@
 #include <ColUDA.h>
 #include <text.h>
 #include <i18n.h>
+#include <stdlib.h>
 
 extern Context context;