@@ -105,9 +105,9 @@ static void primary_by_uuid_cb(guint8 status, const guint8 *ipdu,
        struct discover_primary *dp = user_data;
        GSList *ranges, *last;
        struct att_range *range;
-       uint8_t opdu[ATT_DEFAULT_LE_MTU];
+       uint8_t *opdu;
        guint16 oplen;
-       int err = 0;
+       int err = 0, buflen;

        if (status) {
                err = status == ATT_ECODE_ATTR_NOT_FOUND ? 0 : status;
@@ -126,8 +126,9 @@ static void primary_by_uuid_cb(guint8 status, const guint8 *ipdu,
        if (range->end == 0xffff)
                goto done;

+       opdu = g_attrib_get_buffer(dp->attrib, &buflen);
        oplen = encode_discover_primary(range->end + 1, 0xffff, &dp->uuid,
-                                                       opdu, sizeof(opdu));
+                                                               opdu, buflen);

        if (oplen == 0)
                goto done;