diff --git a/helpers.go b/helpers.go
index a4e5f2c..acd2029 100644
--- a/helpers.go
+++ b/helpers.go
@@ -101,7 +101,7 @@ func getLargestYTFormat(input goutubedl.Result, sizeLimit float64) (format goutu
             } else {
                 size = input.Formats()[i].Filesize
             }
-            if size <= sizeLimit && input.Formats()[i].FormatID != 17 {
+            if size <= sizeLimit && input.Formats()[i].FormatID != "17" {
                 return input.Formats()[i], nil
             }
         }