diff --git a/libraries/AP_HAL_ChibiOS/hwdef/KakuteH7/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/KakuteH7/hwdef.dat
index 140b1bfb99..7f82a2cb94 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/KakuteH7/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/KakuteH7/hwdef.dat
@@ -88,8 +88,8 @@ PA9  USART1_TX USART1
 PA10 USART1_RX USART1
 
 # USART2
-PD5 USART2_TX USART2
-PD6 USART2_RX USART2
+PD5 USART2_TX USART2 NODMA
+PD6 USART2_RX USART2 NODMA
 
 # USART3 (GPS)
 PD8 USART3_TX USART3