diff --git a/Tools/ardupilotwaf/chibios.py b/Tools/ardupilotwaf/chibios.py
index 4d33d62c2a..a14e3f9b8e 100644
--- a/Tools/ardupilotwaf/chibios.py
+++ b/Tools/ardupilotwaf/chibios.py
@@ -461,11 +461,6 @@ def setup_canmgr_build(cfg):
             'CANARD_ALLOCATE_SEM=1'
             ]
 
-    if cfg.env.HAL_CANFD_SUPPORTED:
-        env.DEFINES += ['UAVCAN_SUPPORT_CANFD=1']
-    else:
-        env.DEFINES += ['UAVCAN_SUPPORT_CANFD=0']
-
     cfg.get_board().with_can = True
 
 def setup_canperiph_build(cfg):
@@ -475,11 +470,6 @@ def setup_canperiph_build(cfg):
         'CANARD_ENABLE_DEADLINE=1',
         ]
 
-    if cfg.env.HAL_CANFD_SUPPORTED:
-        env.DEFINES += ['UAVCAN_SUPPORT_CANFD=1']
-    else:
-        env.DEFINES += ['UAVCAN_SUPPORT_CANFD=0']
-
     cfg.get_board().with_can = True
     
 def load_env_vars(env):