diff --git a/lib/xml-stream.js b/lib/xml-stream.js
index de9becd..c15220c 100644
--- a/lib/xml-stream.js
+++ b/lib/xml-stream.js
@@ -197,7 +197,7 @@ function parseEvent(event) {
 // and returns its last state.
 function getFinalState(selector) {
   if (__own.call(this._finalStates, selector.normalized)) {
-    finalState = this._finalStates[selector.normalized];
+    var finalState = this._finalStates[selector.normalized];
   } else {
     var n = selector.parts.length;
     var immediate = false;
@@ -214,7 +214,7 @@ function getFinalState(selector) {
         immediate = false;
       }
     }
-    finalState = this._lastState++;
+    var finalState = this._lastState++;
     this._finalStates[selector.normalized] = finalState;
   }
   return finalState;