diff --git a/lib/linguist/blob_helper.rb b/lib/linguist/blob_helper.rb
index 2d4c54ea..37d8597d 100644
--- a/lib/linguist/blob_helper.rb
+++ b/lib/linguist/blob_helper.rb
@@ -368,7 +368,7 @@ module Linguist
     #
     # Returns a Language or nil
     def guess_language
-      return if binary?
+      return if binary_mime_type?
 
       # Disambiguate between multiple language extensions
       disambiguate_extension_language ||