diff --git a/React/Base/RCTBundleURLProvider.h b/React/Base/RCTBundleURLProvider.h
index b1cf8e29b..47d363c46 100644
--- a/React/Base/RCTBundleURLProvider.h
+++ b/React/Base/RCTBundleURLProvider.h
@@ -9,10 +9,10 @@
 
 #import <Foundation/Foundation.h>
 
-@interface RCTBundleURLProvider : NSObject
-
 extern NSString *const RCTBundleURLProviderUpdatedNotification;
 
+@interface RCTBundleURLProvider : NSObject
+
 /**
  * Set default settings on NSUserDefaults.
  */
diff --git a/React/Base/RCTBundleURLProvider.m b/React/Base/RCTBundleURLProvider.m
index be5826658..722d2f0c1 100644
--- a/React/Base/RCTBundleURLProvider.m
+++ b/React/Base/RCTBundleURLProvider.m
@@ -13,13 +13,13 @@
 
 NSString *const RCTBundleURLProviderUpdatedNotification = @"RCTBundleURLProviderUpdatedNotification";
 
+static const NSUInteger kDefaultPort = 8081;
+
 static NSString *const kRCTJsLocationKey = @"RCT_jsLocation";
 static NSString *const kRCTEnableLiveReloadKey = @"RCT_enableLiveReload";
 static NSString *const kRCTEnableDevKey = @"RCT_enableDev";
 static NSString *const kRCTEnableMinificationKey = @"RCT_enableMinification";
 
-static NSString *const kDefaultPort = @"8081";
-
 @implementation RCTBundleURLProvider
 
 - (instancetype)init
@@ -61,7 +61,7 @@ static NSString *const kDefaultPort = @"8081";
 
 static NSString *serverRootWithHost(NSString *host)
 {
-  return [NSString stringWithFormat:@"http://%@:%@/", host, kDefaultPort];
+  return [NSString stringWithFormat:@"http://%@:%lu/", host, (unsigned long)kDefaultPort];
 }
 
 #if RCT_DEV