diff --git a/include/osmocom/gsm/l1sap.h b/include/osmocom/gsm/l1sap.h
index 322c7ec..01f61ce 100644
--- a/include/osmocom/gsm/l1sap.h
+++ b/include/osmocom/gsm/l1sap.h
@@ -1,3 +1,5 @@
+/*! \file l1sap.h */
+
 #pragma once
 
 #include <osmocom/core/prim.h>