diff --git a/lodash.js b/lodash.js
index 47f0db1aa..e74259907 100644
--- a/lodash.js
+++ b/lodash.js
@@ -6945,9 +6945,10 @@
         if (isArr) {
           accumulator = [];
         } else {
-          var ctor = object && object.constructor,
-              proto = ctor && ctor.prototype;
-
+          if (isObject(object)) {
+            var ctor = object.constructor,
+                proto = ctor && ctor.prototype;
+          }
           accumulator = baseCreate(proto);
         }
       }
diff --git a/test/test.js b/test/test.js
index d77c215ae..7829a64de 100644
--- a/test/test.js
+++ b/test/test.js
@@ -9404,6 +9404,10 @@
       ok(_.transform(new Foo) instanceof Foo);
     });
 
+    test('should check that `object` is an object before using it as the `accumulator` `[[Prototype]]', 1, function() {
+      ok(!(_.transform(1) instanceof Number));
+    });
+
     _.each({
       'array': [1, 2, 3],
       'object': { 'a': 1, 'b': 2, 'c': 3 }