diff --git a/lodash.js b/lodash.js
index c51f4da3f..5b2456fab 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3003,7 +3003,7 @@
       var index = -1,
           length = array ? array.length : 0;
 
-      start = +start || 0;
+      start = typeof start == 'undefined' ? 0 : (+start || 0);
       if (start < 0) {
         start = nativeMax(length + start, 0);
       } else if (start > length) {