3 files changed, 6 insertions, 3 deletions
diff --git a/extmod/extmod.cmake b/extmod/extmod.cmake
index 551dec714..966511fac 100644
--- a/extmod/extmod.cmake
+++ b/extmod/extmod.cmake
@@ -16,6 +16,7 @@ set(MICROPY_SOURCE_EXTMOD
     ${MICROPY_EXTMOD_DIR}/modbluetooth.c
     ${MICROPY_EXTMOD_DIR}/modbtree.c
     ${MICROPY_EXTMOD_DIR}/modframebuf.c
+    ${MICROPY_EXTMOD_DIR}/modlwip.c
     ${MICROPY_EXTMOD_DIR}/modnetwork.c
     ${MICROPY_EXTMOD_DIR}/modonewire.c
     ${MICROPY_EXTMOD_DIR}/moduasyncio.c
@@ -246,4 +247,6 @@ if(MICROPY_PY_LWIP)
     list(APPEND MICROPY_INC_CORE
         ${MICROPY_LIB_LWIP_DIR}/include
     )
+
+    string(CONCAT GIT_SUBMODULES "${GIT_SUBMODULES} " lib/lwip)
 endif()
diff --git a/extmod/extmod.mk b/extmod/extmod.mk
index ff24a549a..60f59183d 100644
--- a/extmod/extmod.mk
+++ b/extmod/extmod.mk
@@ -153,7 +153,7 @@ LWIP_DIR = lib/lwip/src
 INC += -I$(TOP)/$(LWIP_DIR)/include
 CFLAGS_MOD += -DMICROPY_PY_LWIP=1
 $(BUILD)/$(LWIP_DIR)/core/ipv4/dhcp.o: CFLAGS_MOD += -Wno-address
-SRC_MOD += extmod/modlwip.c shared/netutils/netutils.c
+SRC_MOD += shared/netutils/netutils.c
 SRC_MOD += $(addprefix $(LWIP_DIR)/,\
 	apps/mdns/mdns.c \
 	core/def.c \
diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index ec5f3bfd6..bbfd3a225 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -35,6 +35,8 @@
 #include "py/mperrno.h"
 #include "py/mphal.h"
 
+#if MICROPY_PY_LWIP
+
 #include "shared/netutils/netutils.h"
 
 #include "lwip/init.h"
@@ -1741,8 +1743,6 @@ STATIC mp_obj_t lwip_print_pcbs() {
 }
 MP_DEFINE_CONST_FUN_OBJ_0(lwip_print_pcbs_obj, lwip_print_pcbs);
 
-#if MICROPY_PY_LWIP
-
 STATIC const mp_rom_map_elem_t mp_module_lwip_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_lwip) },
     { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&mod_lwip_reset_obj) },