diff --git a/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk b/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
index 821fcf0981..7d9f8a67a6 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
+++ b/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
@@ -68,10 +68,6 @@ ifeq ($(USE_FATFS),yes)
 include $(CHIBIOS)/os/various/fatfs_bindings/fatfs.mk
 endif
 
-ifeq ($(USE_LWIP),yes)
-include $(CHIBIOS)/os/various/lwip_bindings/lwip.mk
-endif
-
 #
 # Build global options
 ##############################################################################
@@ -149,9 +145,8 @@ CSRC += $(CHIBIOS)/os/various/scsi_bindings/lib_scsi.c \
         $(CHIBIOS)/os/hal/src/hal_usb_msd.c
 endif
 
-ifeq ($(USE_LWIP),yes)
+# evtimer used by networking
 CSRC += $(CHIBIOS)/os/various/evtimer.c
-endif
 
 #	   $(TESTSRC) \
 #	   test.c
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
index 3d8a906365..751ca37fc4 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
@@ -910,8 +910,6 @@ class ChibiOSHWDef(object):
 #endif
 #define CH_CFG_USE_MAILBOXES 1
 ''')
-        self.env_vars['USE_LWIP'] = 'yes'
-        self.build_flags.append('USE_LWIP=yes')
 
     def write_mcu_config(self, f):
         '''write MCU config defines'''