diff --git a/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
index dee27d53ba..918e0e6f8e 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
@@ -245,10 +245,10 @@ define HAL_COMPASS_DEFAULT HAL_COMPASS_NONE
 
 DMA_PRIORITY SDMMC* UART8* ADC* SPI* TIM*
 
-define CH_DBG_ENABLE_ASSERTS TRUE
-define CH_DBG_ENABLE_CHECKS TRUE
-define CH_DBG_SYSTEM_STATE_CHECK TRUE
-define CH_DBG_ENABLE_STACK_CHECK TRUE
+#define CH_DBG_ENABLE_ASSERTS TRUE
+#define CH_DBG_ENABLE_CHECKS TRUE
+#define CH_DBG_SYSTEM_STATE_CHECK TRUE
+#define CH_DBG_ENABLE_STACK_CHECK TRUE
 
 # define HAL_SPI_CHECK_CLOCK_FREQ 1