diff --git a/Code/Mantid/Vates/VatesSimpleGui/StandAloneExec/src/SimpleGuiApp.cpp b/Code/Mantid/Vates/VatesSimpleGui/StandAloneExec/src/SimpleGuiApp.cpp
index 4e456176744a4265748a97005b87930130add703..93c1e5d511cfc6a3aa2588f3d69f8d390b8068c4 100644
--- a/Code/Mantid/Vates/VatesSimpleGui/StandAloneExec/src/SimpleGuiApp.cpp
+++ b/Code/Mantid/Vates/VatesSimpleGui/StandAloneExec/src/SimpleGuiApp.cpp
@@ -7,6 +7,7 @@
 #include <QPushButton>
 
 #include <exception>
+#include <iostream>
 
 namespace
 {