diff --git a/libraries/AP_HAL_ChibiOS/hwdef/PH4-mini/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/PH4-mini/hwdef.dat
index dab2914d36..e5feabe5c0 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/PH4-mini/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/PH4-mini/hwdef.dat
@@ -44,3 +44,8 @@ define HAL_BATT_CURR_SCALE 36.364
 # setup safety switch
 PE12 LED_SAFETY OUTPUT
 PE10 SAFETY_IN INPUT PULLDOWN
+
+#redefine dma
+undef DMA_PRIORITY
+DMA_PRIORITY SDMMC* USART2* ADC* SPI* TIM*
+