diff --git a/firmware/config/boards/proteus/board.mk b/firmware/config/boards/proteus/board.mk
index fd22b21c7e..279b78c4a4 100644
--- a/firmware/config/boards/proteus/board.mk
+++ b/firmware/config/boards/proteus/board.mk
@@ -3,10 +3,24 @@ BOARDSRC = $(CHIBIOS)/os/hal/boards/ST_NUCLEO144_F767ZI/board.c
 BOARDSRC_CPP =  $(PROJECT_DIR)/config/boards/proteus/board_configuration.cpp \
 				$(PROJECT_DIR)/config/boards/proteus/adc_hack.cpp
 
-# Required include directories
-BOARDINC = $(PROJECT_DIR)/config/boards/nucleo_f767 $(PROJECT_DIR)/config/stm32f7ems
+# Target processor details
+ifeq ($(PROJECT_CPU),ARCH_STM32F4)
+  MCU_DEFS = -DSTM32F407xx
+  BOARDSRC = $(CHIBIOS)/os/hal/boards/ST_STM32F4_DISCOVERY/board.c
+  BOARDINC = $(BOARDS_DIR)/microrusefi
+  BOARDINC += $(PROJECT_DIR)/config/stm32f4ems	# For board.h
+  BOARDINC += $(BOARDS_DIR)/st_stm32f4
+  LDSCRIPT= $(BOARDS_DIR)/prometheus/STM32F405xG.ld
+else
+  MCU_DEFS = -DSTM32F767xx
+  BOARDSRC = $(CHIBIOS)/os/hal/boards/ST_NUCLEO144_F767ZI/board.c
+  BOARDINC = $(BOARDS_DIR)/nucleo_f767		# For board.h
+  BOARDINC += $(PROJECT_DIR)/config/stm32f7ems	# efifeatures/halconf/chconf.h
+  LDSCRIPT= $(BOARDS_DIR)/nucleo_f767/STM32F76xxI.ld
+endif
+
+
 
-LDSCRIPT= $(PROJECT_DIR)/config/boards/nucleo_f767/STM32F76xxI.ld
 
 # Override DEFAULT_ENGINE_TYPE
 DDEFS += -DSTM32F767xx -DEFI_USE_OSC=TRUE -DEFI_FATAL_ERROR_PIN=GPIOE_3 -DFIRMWARE_ID=\"proteus\" -DDEFAULT_ENGINE_TYPE=PROTEUS -DUSE_ADC3_VBATT_HACK -DSTM32_ADC_USE_ADC3=TRUE -DEFI_INCLUDE_ENGINE_PRESETS=FALSE