diff -r 05ba93066194 -r a7b6f987d269 src/editmodes/circleMode.cpp
--- a/src/editmodes/circleMode.cpp	Sun Sep 06 03:00:28 2015 +0300
+++ b/src/editmodes/circleMode.cpp	Sun Sep 06 03:10:03 2015 +0300
@@ -159,7 +159,7 @@
 		}
 	}
 
-	if (circleOrDisc and refFile != null)
+	if (circleOrDisc and refFile != nullptr)
 	{
 		LDSubfile* ref = LDSpawn<LDSubfile>();
 		ref->setFileInfo (refFile);