diff --git a/libraries/AP_HAL_ChibiOS/hwdef/HEEWING-F405/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/HEEWING-F405/hwdef.dat
index a65b341561..6550be1e79 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/HEEWING-F405/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/HEEWING-F405/hwdef.dat
@@ -91,7 +91,7 @@ PA3 TIM9_CH2 TIM9 RCININT PULLDOWN
 
 # alternative with PA3 as USART2_RX
 PA3 USART2_RX USART2 ALT(1)
-DEFAULT_SERIAL6_PROTOCOL SerialProtocol_RCIN
+define DEFAULT_SERIAL6_PROTOCOL SerialProtocol_RCIN
 
 # USART3 - (labelled UART1 on casing)
 PC10  USART3_TX USART3
@@ -194,4 +194,4 @@ define AP_RPM_PIN_ENABLED 0
 define AP_RPM_GENERATOR_ENABLED 0
 define HAL_PARACHUTE_ENABLED 0
 
-AUTOBUILD_TARGETS Plane
\ No newline at end of file
+AUTOBUILD_TARGETS Plane
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/TMotorH743/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/TMotorH743/hwdef.dat
index b0c90310bd..211d73b8e5 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/TMotorH743/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/TMotorH743/hwdef.dat
@@ -64,22 +64,22 @@ PA12 OTG_FS_DP OTG1
 
 # USART1 (ESC Telemetry)
 PA10 USART1_RX USART1 NODMA
-DEFAULT_SERIAL1_PROTOCOL SerialProtocol_ESCTelemetry
+define DEFAULT_SERIAL1_PROTOCOL SerialProtocol_ESCTelemetry
 
 # UART3
 PD8 USART3_TX USART3 NODMA
 PD9 USART3_RX USART3 NODMA
-DEFAULT_SERIAL3_PROTOCOL SerialProtocol_None
+define DEFAULT_SERIAL3_PROTOCOL SerialProtocol_None
 
 # UART5 (GPS)
 PC12 UART5_TX UART5
 PD2 UART5_RX UART5
-DEFAULT_SERIAL5_PROTOCOL SerialProtocol_GPS
+define DEFAULT_SERIAL5_PROTOCOL SerialProtocol_GPS
 
 # USART6 (RX)
 PC6 USART6_TX USART6
 PC7 USART6_RX USART6
-DEFAULT_SERIAL6_PROTOCOL SerialProtocol_RCIN
+define DEFAULT_SERIAL6_PROTOCOL SerialProtocol_RCIN
 
 # UART7 (DJI)
 PE7 UART7_RX UART7