diff --git a/lodash.js b/lodash.js
index 14d3ea987..f054783d4 100644
--- a/lodash.js
+++ b/lodash.js
@@ -277,9 +277,11 @@
     var index = -1,
         length = array.length,
         first = array[0],
+        mid = array[(length / 2) | 0],
         last = array[length - 1];
 
-    if (first && typeof first == 'object' && last && typeof last == 'object') {
+    if (first && typeof first == 'object' &&
+        mid && typeof mid == 'object' && last && typeof last == 'object') {
       return false;
     }
     var cache = getObject();