diff --git a/lib/underscore.string.js b/lib/underscore.string.js
index 221cf48f..17bc1cbb 100644
--- a/lib/underscore.string.js
+++ b/lib/underscore.string.js
@@ -478,3 +478,12 @@
   }
 
 }(this || window));
+
+_._contains = _.contains;
+_.contains = function(a,b) {
+    if (typeof a == "string" && typeof b == "string") {
+        return _.str.contains(a,b)
+    } else {
+        return _._contains(a,b);
+    }
+};
\ No newline at end of file