diff --git a/gobex/gobex-defs.h b/gobex/gobex-defs.h
index 776615f..9c2ab53 100644
--- a/gobex/gobex-defs.h
+++ b/gobex/gobex-defs.h
@@ -30,8 +30,11 @@ typedef enum {
 	G_OBEX_DATA_REF,
 } GObexDataPolicy;
 
+#define G_OBEX_ERROR_FIRST (0xff + 1)
+#define G_OBEX_PROTO_ERROR(code) ((code) < G_OBEX_ERROR_FIRST)
+
 typedef enum {
-	G_OBEX_ERROR_PARSE_ERROR,
+	G_OBEX_ERROR_PARSE_ERROR = G_OBEX_ERROR_FIRST,
 	G_OBEX_ERROR_INVALID_ARGS,
 	G_OBEX_ERROR_DISCONNECTED,
 	G_OBEX_ERROR_TIMEOUT,
diff --git a/gobex/gobex-transfer.c b/gobex/gobex-transfer.c
index 8434366..a23442e 100644
--- a/gobex/gobex-transfer.c
+++ b/gobex/gobex-transfer.c
@@ -150,7 +150,7 @@ static void transfer_response(GObex *obex, GError *err, GObexPacket *rsp,
 
 	rspcode = g_obex_packet_get_operation(rsp, &final);
 	if (rspcode != G_OBEX_RSP_SUCCESS && rspcode != G_OBEX_RSP_CONTINUE) {
-		err = g_error_new(G_OBEX_ERROR, G_OBEX_ERROR_FAILED,
+		err = g_error_new(G_OBEX_ERROR, rspcode,
 					"Transfer failed (0x%02x)", rspcode);
 		goto failed;
 	}