diff --git a/lodash.js b/lodash.js
index 5dafbfa1c..93e3a9edb 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3074,7 +3074,7 @@
         newValue = srcValue;
         if (isArray(srcValue) || isTypedArray(srcValue)) {
           if (isArray(objValue)) {
-            newValue = srcIndex ? copyArray(objValue) : objValue;
+            newValue = objValue;
           }
           else if (isArrayLikeObject(objValue)) {
             newValue = copyArray(objValue);