diff --git a/node_modules/react-native/Libraries/Blob/RCTFileReaderModule.mm b/node_modules/react-native/Libraries/Blob/RCTFileReaderModule.mm
index caa5540..c5d4e67 100644
--- a/node_modules/react-native/Libraries/Blob/RCTFileReaderModule.mm
+++ b/node_modules/react-native/Libraries/Blob/RCTFileReaderModule.mm
@@ -73,7 +73,7 @@ @implementation RCTFileReaderModule
     } else {
       NSString *type = [RCTConvert NSString:blob[@"type"]];
       NSString *text = [NSString stringWithFormat:@"data:%@;base64,%@",
-                                                  type != nil && [type length] > 0 ? type : @"application/octet-stream",
+                                                  ![type isEqual:[NSNull null]] && [type length] > 0 ? type : @"application/octet-stream",
                                                   [data base64EncodedStringWithOptions:0]];

       resolve(text);