diff --git a/joshuto/mimetype.toml b/joshuto/mimetype.toml
index c24e055..3cfffc2 100644
--- a/joshuto/mimetype.toml
+++ b/joshuto/mimetype.toml
@@ -119,6 +119,7 @@ vim.inherit	= "text_default"
 xml.inherit	= "text_default"
 yaml.inherit	= "text_default"
 yml.inherit	= "text_default"
+tf.inherit	= "text_default"
 
 # archive formats
 7z.app_list	= [