diff --git a/firmware/config/boards/hellen/hellen72/board.mk b/firmware/config/boards/hellen/hellen72/board.mk
index a0bde3c0f2..1763cd36e9 100644
--- a/firmware/config/boards/hellen/hellen72/board.mk
+++ b/firmware/config/boards/hellen/hellen72/board.mk
@@ -25,6 +25,7 @@ DDEFS += -DLED_WARNING_BRAIN_PIN_MODE=INVERTED_OUTPUT
 DDEFS += -DLED_COMMUNICATION_BRAIN_PIN_MODE=INVERTED_OUTPUT
 
 DDEFS += -DSTM32_UART_USE_USART3=FALSE
+DDEFS += -DPRIMARY_UART_DMA_MODE=FALSE
 
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen72\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index 045d96af34..c20ae99c77 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -357,7 +357,9 @@
  *  STM32_UART_USE_USARTx
  * in mcuconf.h
  */
+#ifndef TS_UART_DMA_MODE
 #define TS_UART_DMA_MODE FALSE
+#endif
 
 #ifndef PRIMARY_UART_DMA_MODE
 #define PRIMARY_UART_DMA_MODE TRUE
diff --git a/firmware/hw_layer/ports/stm32/mcuconf_common_f4_f7.h b/firmware/hw_layer/ports/stm32/mcuconf_common_f4_f7.h
index bdf53e543f..76608e11d5 100644
--- a/firmware/hw_layer/ports/stm32/mcuconf_common_f4_f7.h
+++ b/firmware/hw_layer/ports/stm32/mcuconf_common_f4_f7.h
@@ -254,16 +254,25 @@
 /*
  * UART driver system settings.
  */
+#ifndef STM32_UART_USE_USART1
 #define STM32_UART_USE_USART1               FALSE
+#endif
+
 #define STM32_UART_USE_USART2               FALSE
+
 #ifndef STM32_UART_USE_USART3
 #define STM32_UART_USE_USART3               TRUE
 #endif
+
 #define STM32_UART_USE_UART4                FALSE
 #define STM32_UART_USE_UART5                FALSE
 #define STM32_UART_USE_USART6               FALSE
 #define STM32_UART_USE_UART7                FALSE
+
+#ifndef STM32_UART_USE_UART8
 #define STM32_UART_USE_UART8                FALSE
+#endif
+
 #define STM32_UART_USART1_RX_DMA_STREAM     STM32_DMA_STREAM_ID(2, 5)
 #define STM32_UART_USART1_TX_DMA_STREAM     STM32_DMA_STREAM_ID(2, 7)
 #define STM32_UART_USART2_RX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 5)