diff --git a/extmod/extmod.mk b/extmod/extmod.mk
index d2fe2acbad..859f610c90 100644
--- a/extmod/extmod.mk
+++ b/extmod/extmod.mk
@@ -454,6 +454,7 @@ CYW43_DIR = lib/cyw43-driver
 GIT_SUBMODULES += $(CYW43_DIR)
 CFLAGS_EXTMOD += -DMICROPY_PY_NETWORK_CYW43=1
 SRC_THIRDPARTY_C += $(addprefix $(CYW43_DIR)/src/,\
+	cyw43_bthci_uart.c \
 	cyw43_ctrl.c \
 	cyw43_lwip.c \
 	cyw43_ll.c \
@@ -461,9 +462,6 @@ SRC_THIRDPARTY_C += $(addprefix $(CYW43_DIR)/src/,\
 	cyw43_spi.c \
 	cyw43_stats.c \
 	)
-ifeq ($(MICROPY_PY_BLUETOOTH),1)
-DRIVERS_SRC_C += drivers/cyw43/cywbt.c
-endif
 
 $(BUILD)/$(CYW43_DIR)/src/cyw43_%.o: CFLAGS += -std=c11
 endif # MICROPY_PY_NETWORK_CYW43
diff --git a/ports/mimxrt/Makefile b/ports/mimxrt/Makefile
index 8106ab4f3f..5c54295028 100644
--- a/ports/mimxrt/Makefile
+++ b/ports/mimxrt/Makefile
@@ -280,6 +280,7 @@ endif
 
 ifeq ($(MICROPY_PY_BLUETOOTH),1)
 SRC_C += mpbthciport.c
+DRIVERS_SRC_C += drivers/cyw43/cywbt.c
 endif # MICROPY_PY_BLUETOOTH
 
 ifeq ($(MICROPY_BLUETOOTH_NIMBLE),1)
diff --git a/ports/stm32/Makefile b/ports/stm32/Makefile
index 8ac9a8af03..c938dcbda7 100644
--- a/ports/stm32/Makefile
+++ b/ports/stm32/Makefile
@@ -432,6 +432,7 @@ endif
 
 ifeq ($(MICROPY_PY_BLUETOOTH),1)
 SRC_C += mpbthciport.c
+DRIVERS_SRC_C += drivers/cyw43/cywbt.c
 
 ifeq ($(MICROPY_BLUETOOTH_NIMBLE),1)
 SRC_C += mpnimbleport.c