diff --git a/kdc/fast.c b/kdc/fast.c
index 4ab078307..d9d6d5f09 100644
--- a/kdc/fast.c
+++ b/kdc/fast.c
@@ -556,6 +556,7 @@ _kdc_fast_unwrap_request(astgs_request_t r)
 	krb5_free_principal(r->context, armor_server);
     if(armor_user)
 	_kdc_free_ent(r->context, armor_user);
+    free(buf);
 
     return ret;
 }