diff --git a/components/net/lwip-dhcpd/dhcp_server_raw.c b/components/net/lwip-dhcpd/dhcp_server_raw.c
index b271ce36b95d..6d4ce093f7d4 100644
--- a/components/net/lwip-dhcpd/dhcp_server_raw.c
+++ b/components/net/lwip-dhcpd/dhcp_server_raw.c
@@ -35,6 +35,7 @@
 
 #include <stdio.h>
 #include <stdint.h>
+#include <string.h>
 
 #include <rtthread.h>