diff --git a/lib/linguist/mime.rb b/lib/linguist/mime.rb
index 3a3eec79..42c8f1b9 100644
--- a/lib/linguist/mime.rb
+++ b/lib/linguist/mime.rb
@@ -9,6 +9,8 @@ module MIME
     def binary?
       if defined? @binary
         @binary
+      elsif media_type == 'text'
+        false
       else
         @encoding == 'base64'
       end