diff --git a/share/desktop/org.bunkus.mkvtoolnix-gui.desktop b/share/desktop/org.bunkus.mkvtoolnix-gui.desktop
index efb5252df..e4bacd32b 100644
--- a/share/desktop/org.bunkus.mkvtoolnix-gui.desktop
+++ b/share/desktop/org.bunkus.mkvtoolnix-gui.desktop
@@ -14,6 +14,6 @@ GenericName[zh_TW]=Matroska 檔製作軟體
 Icon=mkvtoolnix-gui
 Exec=mkvtoolnix-gui %F
 Terminal=false
-MimeType=application/x-mkvtoolnix-gui-settings;video/x-matroska-3d;video/x-matroska;audio/x-matroska;
+MimeType=application/x-mkvtoolnix-gui-settings;video/x-matroska-3d;video/x-matroska;audio/x-matroska;video/webm;audio/webm;
 Categories=AudioVideo;AudioVideoEditing;
 InitialPreference=-5