diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index 67bf27de..f224494e 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -642,7 +642,9 @@
   
   !insertmacro MUI_INTERFACE
   !insertmacro MUI_BASIC
-  !insertmacro MUI_UNBASIC
+  !ifdef MUI_UNINSTALLER
+	!insertmacro MUI_UNBASIC
+  !endif
   
   !verbose 4