diff --git a/packages/react-native/Libraries/Blob/RCTFileReaderModule.mm b/packages/react-native/Libraries/Blob/RCTFileReaderModule.mm
index caa554029f735e..8356a2a8f485a9 100644
--- a/packages/react-native/Libraries/Blob/RCTFileReaderModule.mm
+++ b/packages/react-native/Libraries/Blob/RCTFileReaderModule.mm
@@ -72,9 +72,10 @@ @implementation RCTFileReaderModule
           nil);
     } else {
       NSString *type = [RCTConvert NSString:blob[@"type"]];
-      NSString *text = [NSString stringWithFormat:@"data:%@;base64,%@",
-                                                  type != nil && [type length] > 0 ? type : @"application/octet-stream",
-                                                  [data base64EncodedStringWithOptions:0]];
+      NSString *text = [NSString
+          stringWithFormat:@"data:%@;base64,%@",
+                           ![type isEqual:[NSNull null]] && [type length] > 0 ? type : @"application/octet-stream",
+                           [data base64EncodedStringWithOptions:0]];
 
       resolve(text);
     }