diff --git a/Libraries/JavaScriptAppEngine/Initialization/ExceptionsManager.js b/Libraries/JavaScriptAppEngine/Initialization/ExceptionsManager.js
index 14bdc8240..a284ce6e3 100644
--- a/Libraries/JavaScriptAppEngine/Initialization/ExceptionsManager.js
+++ b/Libraries/JavaScriptAppEngine/Initialization/ExceptionsManager.js
@@ -80,6 +80,9 @@ function installConsoleErrorReporter() {
   console.reportException = reportException;
   console.errorOriginal = console.error.bind(console);
   console.error = function reactConsoleError() {
+    // Note that when using the built-in context executor on iOS (i.e., not
+    // Chrome debugging), console.error is already stubbed out to cause a
+    // redbox via RCTNativeLoggingHook.
     console.errorOriginal.apply(null, arguments);
     if (!console.reportErrorsAsExceptions) {
       return;
@@ -88,6 +91,7 @@ function installConsoleErrorReporter() {
     if (str.slice(0, 10) === '"Warning: ') {
       // React warnings use console.error so that a stack trace is shown, but
       // we don't (currently) want these to show a redbox
+      // (Note: Logic duplicated in polyfills/console.js.)
       return;
     }
     var error: any = new Error('console.error: ' + str);
diff --git a/packager/react-packager/src/DependencyResolver/polyfills/console.js b/packager/react-packager/src/DependencyResolver/polyfills/console.js
index ff2ff39ff..e04597402 100644
--- a/packager/react-packager/src/DependencyResolver/polyfills/console.js
+++ b/packager/react-packager/src/DependencyResolver/polyfills/console.js
@@ -376,6 +376,12 @@
         var str = Array.prototype.map.call(arguments, function(arg) {
           return inspect(arg, {depth: 10});
         }).join(', ');
+        if (str.slice(0, 10) === "'Warning: " && level >= LOG_LEVELS.error) {
+          // React warnings use console.error so that a stack trace is shown,
+          // but we don't (currently) want these to show a redbox
+          // (Note: Logic duplicated in ExceptionsManager.js.)
+          level = LOG_LEVELS.warn;
+        }
         global.nativeLoggingHook(str, level);
       };
     }