diff --git a/examples/objc/AppRTCMobile/third_party/SocketRocket/SRWebSocket.m b/examples/objc/AppRTCMobile/third_party/SocketRocket/SRWebSocket.m
index 7c1dd98a81..68f3e93f7f 100644
--- a/examples/objc/AppRTCMobile/third_party/SocketRocket/SRWebSocket.m
+++ b/examples/objc/AppRTCMobile/third_party/SocketRocket/SRWebSocket.m
@@ -1080,12 +1080,19 @@ static const uint8_t SRPayloadLenMask   = 0x7F;
     
     NSUInteger dataLength = _outputBuffer.length;
     if (dataLength - _outputBufferOffset > 0 && _outputStream.hasSpaceAvailable) {
-        NSInteger bytesWritten = [_outputStream write:_outputBuffer.bytes + _outputBufferOffset maxLength:dataLength - _outputBufferOffset];
-        if (bytesWritten == -1) {
-            [self _failWithError:[NSError errorWithDomain:SRWebSocketErrorDomain code:2145 userInfo:[NSDictionary dictionaryWithObject:@"Error writing to stream" forKey:NSLocalizedDescriptionKey]]];
-             return;
-        }
-        
+      NSInteger bytesWritten =
+          [_outputStream write:(const unsigned char *)_outputBuffer.bytes + _outputBufferOffset
+                     maxLength:dataLength - _outputBufferOffset];
+      if (bytesWritten == -1) {
+        [self _failWithError:
+                  [NSError errorWithDomain:SRWebSocketErrorDomain
+                                      code:2145
+                                  userInfo:[NSDictionary
+                                               dictionaryWithObject:@"Error writing to stream"
+                                                             forKey:NSLocalizedDescriptionKey]]];
+        return;
+      }
+
         _outputBufferOffset += bytesWritten;
         
         if (_outputBufferOffset > 4096 && _outputBufferOffset > (_outputBuffer.length >> 1)) {