diff --git a/src/msw/helpbest.cpp b/src/msw/helpbest.cpp
index 37de613612..01667e799c 100644
--- a/src/msw/helpbest.cpp
+++ b/src/msw/helpbest.cpp
@@ -94,8 +94,9 @@ wxString wxBestHelpController::GetValidFilename( const wxString& filename ) cons
         default:
             // we CAN'T get here
             wxFAIL_MSG( wxT("wxBestHelpController: Must call Initialize, first!") );
-            return wxEmptyString;
     }
+
+    return wxEmptyString;
 }
 
 #endif