diff --git a/include/osmocom/gsm/gan.h b/include/osmocom/gsm/gan.h
index 6f2b535..efede1d 100644
--- a/include/osmocom/gsm/gan.h
+++ b/include/osmocom/gsm/gan.h
@@ -1,3 +1,5 @@
+/*! \file gan.h */
+
 #pragma once
 
 #include <osmocom/core/utils.h>