diff --git a/Libraries/Network/RCTNetworking.mm b/Libraries/Network/RCTNetworking.mm
index c3bf6c697fc8ee..994eac468466d9 100644
--- a/Libraries/Network/RCTNetworking.mm
+++ b/Libraries/Network/RCTNetworking.mm
@@ -116,7 +116,7 @@ - (RCTURLRequestCancellationBlock)handleResult:(NSDictionary<NSString *, id> *)r
   // We've processed the last item. Finish and return.
   [_multipartBody appendData:[[NSString stringWithFormat:@"--%@--\r\n", _boundary]
                               dataUsingEncoding:NSUTF8StringEncoding]];
-  NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=\"%@\"", _boundary];
+  NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", _boundary];
   return _callback(nil, @{@"body": _multipartBody, @"contentType": contentType});
 }