diff --git a/effects/diminactive/diminactive.cpp b/effects/diminactive/diminactive.cpp
index 2e5b6f8375..a9e154ba04 100644
--- a/effects/diminactive/diminactive.cpp
+++ b/effects/diminactive/diminactive.cpp
@@ -109,6 +109,8 @@ void DimInactiveEffect::windowActivated( EffectWindow* w )
         {
         previousActive = active;
         previousActiveTimeline.setProgress( 0.0 );
+        if( !dimWindow( previousActive ) )
+            previousActive = NULL;
 
         if( dim_by_group )
             {