1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/sessionstore/test/browser_645428.js b/browser/components/sessionstore/test/browser_645428.js
index bbb3b1b299..3916c44a7e 100644
--- a/browser/components/sessionstore/test/browser_645428.js
+++ b/browser/components/sessionstore/test/browser_645428.js
@@ -6,7 +6,7 @@ const NOTIFICATION = "sessionstore-browser-state-restored";
 function test() {
   waitForExplicitFinish();
 
-  function observe(subject, topic, data) {
+  function observe(subject, topic) {
     if (NOTIFICATION == topic) {
       finish();
       ok(true, "TOPIC received");