diff --git a/apps/opencs/model/prefs/state.hpp b/apps/opencs/model/prefs/state.hpp
index 13427b1aa1..7807dac257 100644
--- a/apps/opencs/model/prefs/state.hpp
+++ b/apps/opencs/model/prefs/state.hpp
@@ -89,7 +89,7 @@ namespace CSMPrefs
 
         signals:
 
-            void settingChanged (const Setting *setting);
+            void settingChanged (const CSMPrefs::Setting *setting);
     };
 
     // convenience function