diff --git a/src/GUI/menubar.hxx b/src/GUI/menubar.hxx
index df3b9cf60..3e70c48c1 100644
--- a/src/GUI/menubar.hxx
+++ b/src/GUI/menubar.hxx
@@ -51,7 +51,7 @@ public:
      * Take care of mapping it to the appropriate translation, if available.
      * Returns an UTF-8 encoded string.
      */
-    const char* getLocalizedLabel(SGPropertyNode* node);
+    static const char* getLocalizedLabel(SGPropertyNode* node);
 
 };