diff --git a/lib/hdb/db.c b/lib/hdb/db.c
index c3006fa81..d8fc8d8f1 100644
--- a/lib/hdb/db.c
+++ b/lib/hdb/db.c
@@ -228,7 +228,7 @@ DB__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
     if(code == 1)
 	return HDB_ERR_NOENTRY;
     
-    krb5_data_copy(reply, v.size, v.data);
+    krb5_data_copy(reply, v.data, v.size);
     return 0;
 }