diff --git a/components/net/lwip_dhcpd/dhcp_server.c b/components/net/lwip_dhcpd/dhcp_server.c
index 4acfb9cba0..a549d8d0e1 100644
--- a/components/net/lwip_dhcpd/dhcp_server.c
+++ b/components/net/lwip_dhcpd/dhcp_server.c
@@ -122,7 +122,10 @@ static rt_err_t _low_level_dhcp_send(struct netif *netif,
     memcpy((char *)udphdr + sizeof(struct udp_hdr),
            buffer, size);
 
-    return netif->linkoutput(netif, p);
+    netif->linkoutput(netif, p);
+    pbuf_free(p);
+    
+    return RT_EOK;
 }
 
 static void dhcpd_thread_entry(void *parameter)