diff --git a/ApplicationCode/Commands/IntersectionBoxCommands/RicIntersectionFeatureImpl.h b/ApplicationCode/Commands/IntersectionBoxCommands/RicIntersectionFeatureImpl.h
index 20e198a92a..c660c1c02a 100644
--- a/ApplicationCode/Commands/IntersectionBoxCommands/RicIntersectionFeatureImpl.h
+++ b/ApplicationCode/Commands/IntersectionBoxCommands/RicIntersectionFeatureImpl.h
@@ -15,6 +15,9 @@
 //  for more details.
 //
 /////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
 #include "RimIntersectionBox.h"
 
 class QString;