diff --git a/components/net/lwip/SConscript b/components/net/lwip/SConscript
index adc16de628d47f7a7a33f5254150b8a151c62b99..2e2dc350e3484fc66c162e9090bc4b07654bf526 100644
--- a/components/net/lwip/SConscript
+++ b/components/net/lwip/SConscript
@@ -47,8 +47,6 @@ src/core/snmp/mib_structs.c
 src/core/snmp/msg_in.c
 src/core/snmp/msg_out.c
 """)
-if GetDepend(['RT_LWIP_PPP']):
-    src += ppp_src
 
 ppp_src = Split("""
 src/netif/ppp/auth.c