diff --git a/firmware/config/boards/f407-discovery/board.mk b/firmware/config/boards/f407-discovery/board.mk
index e774320626..8d4abb4416 100644
--- a/firmware/config/boards/f407-discovery/board.mk
+++ b/firmware/config/boards/f407-discovery/board.mk
@@ -25,6 +25,4 @@ DDEFS += $(DEFAULT_ENGINE_TYPE)
 DDEFS += -DSTM32_SERIAL_USE_USART3=TRUE
 DDEFS += -DTS_SECONDARY_UxART_PORT=SD3
 
-DDEFS += -DSTM32_I2C_USE_I2C3=TRUE
-
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE