diff --git a/artiq/runtime/liblwip/Makefile b/artiq/runtime/liblwip/Makefile
index ae3facbba..f687a77c6 100644
--- a/artiq/runtime/liblwip/Makefile
+++ b/artiq/runtime/liblwip/Makefile
@@ -15,6 +15,7 @@ COREFILES=core/mem.c \
 	core/raw.c \
 	core/stats.c \
 	core/sys.c \
+	core/ip.c \
 	core/tcp.c \
 	core/tcp_in.c \
 	core/tcp_out.c \
@@ -29,7 +30,8 @@ CORE4FILES=core/ipv4/icmp.c \
 	core/ipv4/ip_frag.c
 
 # NETIFFILES: Files implementing various generic network interface functions.
-NETIFFILES=netif/etharp.c
+NETIFFILES=netif/etharp.c \
+	netif/ethernet.c
 
 PPPFILES=netif/ppp/auth.c \
 	netif/ppp/fsm.c \
diff --git a/artiq/runtime/lwip b/artiq/runtime/lwip
index e448a9a4a..33955c636 160000
--- a/artiq/runtime/lwip
+++ b/artiq/runtime/lwip
@@ -1 +1 @@
-Subproject commit e448a9a4a976a6bc3091e3f22309ae3e6c089351
+Subproject commit 33955c636d17bee230cde746a92e1cff11a7a177