diff --git a/doomsday/libdeng2/src/widgets/indirectrule.cpp b/doomsday/libdeng2/src/widgets/indirectrule.cpp
index 36a97e9017..8b92ced5be 100644
--- a/doomsday/libdeng2/src/widgets/indirectrule.cpp
+++ b/doomsday/libdeng2/src/widgets/indirectrule.cpp
@@ -40,6 +40,8 @@ void IndirectRule::unsetSource()
 {
     independentOf(_source);
     _source = 0;
+
+    invalidate();
 }
 
 void IndirectRule::update()