diff --git a/firmware/config/boards/hellen/hellen72/board.mk b/firmware/config/boards/hellen/hellen72/board.mk
index c614c7131e..533f280eb5 100644
--- a/firmware/config/boards/hellen/hellen72/board.mk
+++ b/firmware/config/boards/hellen/hellen72/board.mk
@@ -19,6 +19,11 @@ endif
 
 DDEFS += -DEFI_MAIN_RELAY_CONTROL=TRUE
 
+# todo: invert 4th LED
+DDEFS += -DLED_ERROR_BRAIN_PIN_MODE=INVERTED_OUTPUT
+DDEFS += -DLED_RUNING_BRAIN_PIN_MODE=INVERTED_OUTPUT
+DDEFS += -DLED_WARNING_BRAIN_PIN_MODE=INVERTED_OUTPUT
+
 # 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