1 files changed, 3 insertions, 0 deletions
diff --git a/lib/transform.js b/lib/transform.js
index 6098522..175ad85 100644
--- a/lib/transform.js
+++ b/lib/transform.js
@@ -1,6 +1,8 @@
 import isArray from 'lodash/isArray';
+import noop from 'lodash/noop';
 
 import eachOf from './eachOf';
+import once from './internal/once';
 
 /**
  * A relative of `reduce`.  Takes an Object or Array, and iterates over each
@@ -53,6 +55,7 @@ export default function transform (coll, accumulator, iteratee, callback) {
         iteratee = accumulator;
         accumulator = isArray(coll) ? [] : {};
     }
+    callback = once(callback || noop);
 
     eachOf(coll, function(v, k, cb) {
         iteratee(accumulator, v, k, cb);