diff --git a/filetypes.xml b/filetypes.xml
index 5eb02b3..8a5b9ef 100644
--- a/filetypes.xml
+++ b/filetypes.xml
@@ -3,6 +3,7 @@
     <extensionMap>
       <mapping ext="csv" type="PLAIN_TEXT" />
       <mapping ext="obj" type="PLAIN_TEXT" />
+      <mapping ext="mtl" type="PLAIN_TEXT" />
       <removed_mapping ext="apk" approved="true" type="ARCHIVE" />
       <removed_mapping ext="db" approved="true" type="SQLite" />
       <removed_mapping ext="ignore" approved="true" type="IgnoreLang file" />