diff --git a/src/jquery.smoothState.js b/src/jquery.smoothState.js
index b14ba7e..1ceacf4 100644
--- a/src/jquery.smoothState.js
+++ b/src/jquery.smoothState.js
@@ -331,7 +331,7 @@
           $page = $('#' + e.state.id),
           page = $page.data('smoothState'),
           diffUrl = (page.href !== url && !utility.isHash(url, page.href)),
-          diffState = (e.state !== page.cache[page.href].state);
+          diffState = (page.cache[page.href] && e.state !== page.cache[page.href].state);
 
         if(diffUrl || diffState) {
           if (diffState) {
@@ -835,4 +835,4 @@
   /* expose the default options */
   $.fn.smoothState.options = defaults;
 
-}));
\ No newline at end of file
+}));