diff --git a/custom_formats/Unknown Lossless Audio.yml b/custom_formats/Unknown Lossless Audio.yml
index 6a66371..ec70ece 100644
--- a/custom_formats/Unknown Lossless Audio.yml	
+++ b/custom_formats/Unknown Lossless Audio.yml	
@@ -60,4 +60,9 @@ conditions:
   pattern: Dolby Digital +
   required: true
   type: release_title
+- name: Not Missing Group
+  type: release_title
+  required: true
+  negate: true
+  pattern: TrueHD (Missing Groups)
 tests: []