diff --git a/client/Windows/wf_floatbar.c b/client/Windows/wf_floatbar.c
index fc1d4acbc..1c0be8a8b 100644
--- a/client/Windows/wf_floatbar.c
+++ b/client/Windows/wf_floatbar.c
@@ -217,6 +217,7 @@ static BOOL button_set_locked(Button* button, BOOL locked)
 
 	InvalidateRect(button->floatbar->hwnd, NULL, FALSE);
 	UpdateWindow(button->floatbar->hwnd);
+	return TRUE;
 }
 
 static BOOL update_locked_state(wfFloatBar* floatbar)