diff --git a/lib/krb5/free_host_realm.c b/lib/krb5/free_host_realm.c
index 9ac304845..d261e1286 100644
--- a/lib/krb5/free_host_realm.c
+++ b/lib/krb5/free_host_realm.c
@@ -40,6 +40,10 @@
 
 RCSID("$Id$");
 
+/*
+ * Free all memory allocated by `realmlist'
+ */
+
 krb5_error_code
 krb5_free_host_realm(krb5_context context,
 		     krb5_realm *realmlist)