diff --git a/firmware/config/boards/hellen/hellen81/board.mk b/firmware/config/boards/hellen/hellen81/board.mk
index 3186a05c14..56102b47a5 100644
--- a/firmware/config/boards/hellen/hellen81/board.mk
+++ b/firmware/config/boards/hellen/hellen81/board.mk
@@ -19,7 +19,9 @@ DDEFS += -DHAL_TRIGGER_USE_ADC=TRUE
 #DDEFS += -DEFI_OVERRIDE_FAST_ADC_FOR_STM32H7=TRUE -DADC_FAST_DEVICE=ADCD1 -DADC_SLOW_DEVICE=ADCD3 -DSTM32_ADC_USE_ADC3=TRUE
 #DDEFS += -DADC_SLOW_DEVICE=ADCD3 -DSTM32_ADC_USE_ADC3=TRUE
 
-DDEFS += -DEFI_OVERRIDE_FAST_ADC_FOR_STM32H7=TRUE -DADC_FAST_DEVICE=ADCD1 -DEFI_USE_ONLY_FAST_ADC=TRUE -DEFI_FASTER_UNIFORM_ADC=TRUE -DADC_MAX_CHANNELS_COUNT=16 -DADC_BUF_DEPTH_FAST=1 -DADC_BUF_NUM_AVG=1
+DDEFS += -DEFI_OVERRIDE_FAST_ADC_FOR_STM32H7=TRUE -DADC_FAST_DEVICE=ADCD1 -DEFI_USE_ONLY_FAST_ADC=TRUE -DEFI_FASTER_UNIFORM_ADC=TRUE
+DDEFS += -DADC_BUF_DEPTH_FAST=1
+DDEFS += -DADC_BUF_NUM_AVG=1
 #DDEFS += -DADC_SLOW_DEVICE=ADCD1
 
 DDEFS += -DSHORT_BOARD_NAME=hellen81