diff --git a/apps/anc/Makefile b/apps/anc/Makefile
index 39072db8..3ab8bc14 100644
--- a/apps/anc/Makefile
+++ b/apps/anc/Makefile
@@ -25,6 +25,7 @@ endif
 
 ifeq ($(ANC_ASSIST_ENABLED),1)
 CFLAGS_app_anc.o += -DANC_ASSIST_ENABLED
+CFLAGS_anc_assist.o += -DANC_ASSIST_ENABLED
 
 ifeq ($(ANC_ASSIST_WNR_ENABLED),1)
 CFLAGS_anc_assist.o += -DANC_ASSIST_WNR_ENABLED
diff --git a/config/open_source/target.mk b/config/open_source/target.mk
index eeadf46f..e12478e5 100644
--- a/config/open_source/target.mk
+++ b/config/open_source/target.mk
@@ -64,7 +64,7 @@ AUDIO_OUTPUT_MONO ?= 0
 AUDIO_OUTPUT_DIFF ?= 0
 
 # Raise mic bias from 2.2V to 3.3V
-DIGMIC_HIGH_VOLT?=0 
+DIGMIC_HIGH_VOLT ?= 0 
 
 #### ANC DEFINE START ######
 export ANC_APP		    ?= 1
@@ -84,10 +84,10 @@ export AUDIO_ANC_FB_MC_HW ?=0
 export APP_ANC_KEY ?= 1
 # Feedback check for feedforward mic. Locked on due to blobs
 export ANC_FB_CHECK ?= 1
-##### ANC DEFINE END ######
-
 # Build in ANC testing app (closed source)
 APP_ANC_TEST ?= 0
+export ANC_ASSIST_ENABLED ?= 0
+##### ANC DEFINE END ######
 
 # Allow test commands via bluetooth
 TEST_OVER_THE_AIR ?= 0
diff --git a/platform/hal/hal_aud.h b/platform/hal/hal_aud.h
index 508170ef..cfcec672 100644
--- a/platform/hal/hal_aud.h
+++ b/platform/hal/hal_aud.h
@@ -205,7 +205,7 @@ enum AUD_STREAM_ID_T {
     AUD_STREAM_ID_0 = 0,
     AUD_STREAM_ID_1,
     AUD_STREAM_ID_2,
-#ifdef __ANC_ASSIST__
+#ifdef ANC_ASSIST_ENABLED
     AUD_STREAM_ID_3,
 #endif
     AUD_STREAM_ID_NUM,
@@ -230,7 +230,7 @@ enum AUD_IO_PATH_T {
     AUD_INPUT_PATH_NTMIC,
     AUD_INPUT_PATH_ANC_WNR, // Wind Noise Reduction
     AUD_INPUT_PATH_USBAUDIO,
-#ifdef __ANC_ASSIST__
+#ifdef ANC_ASSIST_ENABLED
     AUD_INPUT_PATH_AF_ANC,
 #endif
     // Output path