diff --git a/src/pjax.js b/src/pjax.js
index 963d683..cccfc2e 100644
--- a/src/pjax.js
+++ b/src/pjax.js
@@ -92,7 +92,7 @@
       window.history.pushState &&
       window.history.replaceState &&
       // pushState isn’t reliable on iOS until 5.
-      !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]|WebApps\/.+CFNetwork)/)
+      !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
   }
 
   Pjax.forEachEls = function(els, fn, context) {