diff --git a/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js b/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
index 19aee0d985..8e77b3346e 100644
--- a/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
+++ b/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
@@ -134,8 +134,8 @@ var ReactUpdateQueue = {
       return;
     }
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }
@@ -174,8 +174,8 @@ var ReactUpdateQueue = {
     internalInstance._pendingStateQueue = [completeState];
     internalInstance._pendingReplaceState = true;
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }
@@ -222,8 +222,8 @@ var ReactUpdateQueue = {
       (internalInstance._pendingStateQueue = []);
     queue.push(partialState);
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }