diff --git a/src/ios/CDVFileTransfer.m b/src/ios/CDVFileTransfer.m
index 3113c26..2655e48 100644
--- a/src/ios/CDVFileTransfer.m
+++ b/src/ios/CDVFileTransfer.m
@@ -143,8 +143,8 @@ static CFIndex WriteDataToStream(NSData* data, CFWriteStreamRef stream)
     NSString* target = [command argumentAtIndex:0];
     NSString* server = [command argumentAtIndex:1];
     NSString* fileKey = [command argumentAtIndex:2 withDefault:@"file"];
-    NSString* fileName = [command argumentAtIndex:3 withDefault:@"no-filename"];
-    NSString* mimeType = [command argumentAtIndex:4 withDefault:nil];
+    NSString* fileName = [command argumentAtIndex:3 withDefault:@"image.jpg"];
+    NSString* mimeType = [command argumentAtIndex:4 withDefault:@"image/jpeg"];
     NSDictionary* options = [command argumentAtIndex:5 withDefault:nil];
     //    BOOL trustAllHosts = [[command argumentAtIndex:6 withDefault:[NSNumber numberWithBool:YES]] boolValue]; // allow self-signed certs
     BOOL chunkedMode = [[command argumentAtIndex:7 withDefault:[NSNumber numberWithBool:YES]] boolValue];