diff --git a/common/modules/buffer.jsm b/common/modules/buffer.jsm
index 51879f3b..839a7f7d 100644
--- a/common/modules/buffer.jsm
+++ b/common/modules/buffer.jsm
@@ -262,7 +262,8 @@ var Buffer = Module("Buffer", {
      */
     get pageURI() {
         let uri = this.uri;
-        uri.ref = "";
+        if (!uri.ref.startsWith("!"))
+            uri.ref = "";
         return uri;
     },