diff --git a/arch/arm/src/stm32/chip/stm32f20xxx_dma.h b/arch/arm/src/stm32/chip/stm32f20xxx_dma.h
index 1389c0eef61..f3660fb1dbd 100644
--- a/arch/arm/src/stm32/chip/stm32f20xxx_dma.h
+++ b/arch/arm/src/stm32/chip/stm32f20xxx_dma.h
@@ -512,7 +512,7 @@
 #define DMAMAP_TIM8_UP             STM32_DMA_MAP(DMA2,DMA_STREAM1,DMA_CHAN7)
 #define DMAMAP_TIM8_CH1_2          STM32_DMA_MAP(DMA2,DMA_STREAM2,DMA_CHAN7)
 #define DMAMAP_TIM8_CH2_2          STM32_DMA_MAP(DMA2,DMA_STREAM3,DMA_CHAN7)
-#define DMAMAP_TIM8_CH3_2          STM32_DMA_MAP(DMA2,DMA_STREAM5,DMA_CHAN7)
+#define DMAMAP_TIM8_CH3_2          STM32_DMA_MAP(DMA2,DMA_STREAM4,DMA_CHAN7)
 #define DMAMAP_TIM8_CH4            STM32_DMA_MAP(DMA2,DMA_STREAM7,DMA_CHAN7)
 #define DMAMAP_TIM8_TRIG           STM32_DMA_MAP(DMA2,DMA_STREAM7,DMA_CHAN7)
 #define DMAMAP_TIM8_COM            STM32_DMA_MAP(DMA2,DMA_STREAM7,DMA_CHAN7)