diff --git a/port/max32630-fthr/example/template/Makefile b/port/max32630-fthr/example/template/Makefile
index 1d811edfc..6bd365a09 100644
--- a/port/max32630-fthr/example/template/Makefile
+++ b/port/max32630-fthr/example/template/Makefile
@@ -218,6 +218,7 @@ SBC_DECODER += \
 SBC_ENCODER += \
 	btstack_sbc_encoder_bluedroid.c \
 	hfp_msbc.c \
+    hfp_codec.c
 
 HXCMOD_PLAYER = \
 	hxcmod.c 						\
diff --git a/port/msp432p401lp-cc256x/Makefile b/port/msp432p401lp-cc256x/Makefile
index bba0c1dbf..5fbe173dd 100755
--- a/port/msp432p401lp-cc256x/Makefile
+++ b/port/msp432p401lp-cc256x/Makefile
@@ -137,6 +137,7 @@ ${BTSTACK_ROOT}/src/classic/hfp.c \
 ${BTSTACK_ROOT}/src/classic/hfp_ag.c \
 ${BTSTACK_ROOT}/src/classic/hfp_gsm_model.c \
 ${BTSTACK_ROOT}/src/classic/hfp_hf.c \
+${BTSTACK_ROOT}/src/classic/hfp_codec.c \
 ${BTSTACK_ROOT}/src/classic/hfp_msbc.c \
 ${BTSTACK_ROOT}/src/classic/hid_device.c \
 ${BTSTACK_ROOT}/src/classic/hid_host.c \
diff --git a/port/stm32-f4discovery-cc256x/Makefile b/port/stm32-f4discovery-cc256x/Makefile
index be5f82125..cdb71ca6e 100644
--- a/port/stm32-f4discovery-cc256x/Makefile
+++ b/port/stm32-f4discovery-cc256x/Makefile
@@ -107,6 +107,7 @@ ${BTSTACK_ROOT}/src/classic/hfp.c \
 ${BTSTACK_ROOT}/src/classic/hfp_ag.c \
 ${BTSTACK_ROOT}/src/classic/hfp_gsm_model.c \
 ${BTSTACK_ROOT}/src/classic/hfp_hf.c \
+${BTSTACK_ROOT}/src/classic/hfp_codec.c \
 ${BTSTACK_ROOT}/src/classic/hfp_msbc.c \
 ${BTSTACK_ROOT}/src/classic/hid_device.c \
 ${BTSTACK_ROOT}/src/classic/hid_host.c \
diff --git a/port/stm32-f4discovery-usb/Makefile b/port/stm32-f4discovery-usb/Makefile
index f8bb9c834..10d22e141 100644
--- a/port/stm32-f4discovery-usb/Makefile
+++ b/port/stm32-f4discovery-usb/Makefile
@@ -107,6 +107,7 @@ ${BTSTACK_ROOT}/src/classic/hfp.c \
 ${BTSTACK_ROOT}/src/classic/hfp_ag.c \
 ${BTSTACK_ROOT}/src/classic/hfp_gsm_model.c \
 ${BTSTACK_ROOT}/src/classic/hfp_hf.c \
+${BTSTACK_ROOT}/src/classic/hfp_codec.c \
 ${BTSTACK_ROOT}/src/classic/hfp_msbc.c \
 ${BTSTACK_ROOT}/src/classic/hid_device.c \
 ${BTSTACK_ROOT}/src/classic/hid_host.c \
diff --git a/src/classic/Makefile.inc b/src/classic/Makefile.inc
index 1c6fb8f15..e937fce4a 100644
--- a/src/classic/Makefile.inc
+++ b/src/classic/Makefile.inc
@@ -30,6 +30,7 @@ SRC_CLASSIC_FILES = \
     hfp_gsm_model.c \
     hfp_hf.c \
     hfp_msbc.c \
+    hfp_codec.c \
     hid_device.c \
     hsp_ag.c \
     hsp_hs.c \