diff --git a/flight/PiOS/Boards/STM3210E_OP.h b/flight/PiOS/Boards/STM3210E_OP.h
index 854d8d353..be6727f5b 100644
--- a/flight/PiOS/Boards/STM3210E_OP.h
+++ b/flight/PiOS/Boards/STM3210E_OP.h
@@ -353,7 +353,7 @@ TIM8  | Servo 5   | Servo 6   | Servo 7   | Servo 8
                                                 /* With an ADCCLK = 14 MHz and a sampling time of 293.5 cycles: */
                                                 /* Tconv = 239.5 + 12.5 = 252 cycles = 18?s */
                                                 /* (1 / (ADCCLK / CYCLES)) = Sample Time (?S) */
-#define PIOS_ADC_IRQ_PRIO                       PIOS_IRQ_PRIO_MID
+#define PIOS_ADC_IRQ_PRIO                       PIOS_IRQ_PRIO_LOW
 
 //-------------------------
 // GPIO
diff --git a/flight/PiOS/STM32F10x/pios_adc.c b/flight/PiOS/STM32F10x/pios_adc.c
index bceea9fd7..4df026a48 100644
--- a/flight/PiOS/STM32F10x/pios_adc.c
+++ b/flight/PiOS/STM32F10x/pios_adc.c
@@ -142,7 +142,7 @@ void PIOS_ADC_Init(void)
 	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
 	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
 	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
-	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
+	DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
 	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
 	DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 	DMA_Cmd(DMA1_Channel1, ENABLE);