diff --git a/firmware/CHANGELOG.md b/firmware/CHANGELOG.md
index b01a4c5d57..a1beefcd5c 100644
--- a/firmware/CHANGELOG.md
+++ b/firmware/CHANGELOG.md
@@ -33,6 +33,7 @@ All notable user-facing or behavior-altering changes will be documented in this
 ### Fixed
  - A/C control bugfix
  - Better Windows build-in DFU #3338
+ - Proteus now waits for VBatt to enable main relay output
 
 ## Removed
  - Remove engine load acceleration enrichment #3357
diff --git a/firmware/config/boards/proteus/board.mk b/firmware/config/boards/proteus/board.mk
index 165d5735a1..22d63f7268 100644
--- a/firmware/config/boards/proteus/board.mk
+++ b/firmware/config/boards/proteus/board.mk
@@ -17,6 +17,8 @@ DDEFS += -DEFI_USE_OSC=TRUE
 DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=GPIOE_3
 DDEFS += -DFIRMWARE_ID=\"proteus\" $(DEFAULT_ENGINE_TYPE)
 
+DDEFS += -DEFI_MAIN_RELAY_CONTROL=TRUE
+
 DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 # todo: refactor HAL_VSS_USE_PAL