diff --git a/include/osmocom/gsm/protocol/gsm_23_003.h b/include/osmocom/gsm/protocol/gsm_23_003.h
index a2109b6..94243fe 100644
--- a/include/osmocom/gsm/protocol/gsm_23_003.h
+++ b/include/osmocom/gsm/protocol/gsm_23_003.h
@@ -1,3 +1,5 @@
+/*! \file gsm_23_003.h */
+
 #pragma once
 
 /* Chapter 2.2 */