diff --git a/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk b/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
index ee402ed373..66272ed1db 100644
--- a/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
+++ b/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
@@ -29,7 +29,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellenNA6\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
-# -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
+DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
 DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
diff --git a/firmware/config/boards/hellen/hellen72/board.mk b/firmware/config/boards/hellen/hellen72/board.mk
index ce7cd73eef..0647814af2 100644
--- a/firmware/config/boards/hellen/hellen72/board.mk
+++ b/firmware/config/boards/hellen/hellen72/board.mk
@@ -29,7 +29,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen72\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
-# -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
+DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
 DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE