diff --git a/rules.cpp b/rules.cpp
index 2c8a17c5c6..c3d44a7512 100644
--- a/rules.cpp
+++ b/rules.cpp
@@ -606,7 +606,7 @@ void WindowRules::discardTemporary()
          it != rules.end();
          )
         {
-        if( (*it)->discardTemporary( false ))
+        if( (*it)->discardTemporary( true ))
             ++it;
         else
             {