diff --git a/firmware/config/boards/hellen/hellen81/board.mk b/firmware/config/boards/hellen/hellen81/board.mk
index 502b4bfe71..b4a4a1be29 100644
--- a/firmware/config/boards/hellen/hellen81/board.mk
+++ b/firmware/config/boards/hellen/hellen81/board.mk
@@ -19,11 +19,16 @@ DDEFS += -DHAL_TRIGGER_USE_ADC=TRUE
 #DDEFS += -DADC_FAST_DEVICE=ADCD1 -DADC_SLOW_DEVICE=ADCD3 -DSTM32_ADC_USE_ADC3=TRUE
 #DDEFS += -DADC_SLOW_DEVICE=ADCD3 -DSTM32_ADC_USE_ADC3=TRUE
 
-DDEFS += -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_FAST_DEVICE=ADCD1 -DEFI_USE_ONLY_FAST_ADC=TRUE
 #DDEFS += -DADC_SLOW_DEVICE=ADCD1
 
+
+# implementation not in master as of today DDEFS += -DEFI_FASTER_UNIFORM_ADC=TRUE
+# for analog VR we want to access un-averaged most raw data
+# DDEFS += -DADC_BUF_DEPTH_FAST=1
+# DDEFS += -DADC_BUF_NUM_AVG=1
+
+
 DDEFS += -DSHORT_BOARD_NAME=hellen81
 
 include $(BOARDS_DIR)/hellen/hellen-common176.mk