diff --git a/mobile/chrome/content/browser-ui.js b/mobile/chrome/content/browser-ui.js
index 390c7042ae34..0f7c4756dbab 100644
--- a/mobile/chrome/content/browser-ui.js
+++ b/mobile/chrome/content/browser-ui.js
@@ -664,7 +664,7 @@ var BookmarkHelper = {
     this._editor.setAttribute("ui", "manage");
     this._editor.setAttribute("title", title);
     this._editor.setAttribute("uri", aURI.spec);
-    this._editor.setAttribute("tags", tags.join(" "));
+    this._editor.setAttribute("tags", tags.join(", "));
     this._editor.setAttribute("onmove", "FolderPicker.show(this);");
     this._editor.setAttribute("onclose", "BookmarkHelper.close()");
     document.getElementById("bookmark-form").appendChild(this._editor);