diff --git a/common/modules/buffer.jsm b/common/modules/buffer.jsm
index 78108344..e5a7722f 100644
--- a/common/modules/buffer.jsm
+++ b/common/modules/buffer.jsm
@@ -1111,7 +1111,7 @@ var Buffer = Module("Buffer", {
 
         // Ctrl-g single line output
         if (!verbose) {
-            let file = this.win.location.pathname.split("/").pop() || _("buffer.noName");
+            let file = this.win.location.pathname.split("/").pop() || String(_("buffer.noName"));
             let title = this.win.document.title || _("buffer.noTitle");
 
             let info = template.map(