diff --git a/Tools/ardupilotwaf/chibios.py b/Tools/ardupilotwaf/chibios.py
index c31479c270..b84d6e8951 100644
--- a/Tools/ardupilotwaf/chibios.py
+++ b/Tools/ardupilotwaf/chibios.py
@@ -691,9 +691,6 @@ def build(bld):
     common_src += bld.path.ant_glob('libraries/AP_HAL_ChibiOS/hwdef/common/*.mk')
     common_src += bld.path.ant_glob('modules/ChibiOS/os/hal/**/*.[ch]')
     common_src += bld.path.ant_glob('modules/ChibiOS/os/hal/**/*.mk')
-    common_src += bld.path.ant_glob('modules/ChibiOS/ext/lwip/src/**/*.[ch]')
-    common_src += bld.path.ant_glob('modules/ChibiOS/ext/lwip/src/netif/**/*.[ch]')
-    common_src += bld.path.ant_glob('modules/ChibiOS/ext/lwip/src/core/**/*.[ch]')
     if bld.env.ROMFS_FILES:
         common_src += [bld.bldnode.find_or_declare('ap_romfs_embedded.h')]