diff --git a/arch/arm/src/stm32l4/chip/stm32l4x3xx_dma.h b/arch/arm/src/stm32l4/chip/stm32l4x3xx_dma.h
index 166562c9c5..e312e0f9e8 100644
--- a/arch/arm/src/stm32l4/chip/stm32l4x3xx_dma.h
+++ b/arch/arm/src/stm32l4/chip/stm32l4x3xx_dma.h
@@ -449,7 +449,7 @@
 #define DMACHAN_USART2_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN6, 2)
 #define DMACHAN_USART2_TX       DMACHAN_SETTING(STM32L4_DMA1_CHAN7, 2)
 
-#define DMACHAN_USART3_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN3, 1)
+#define DMACHAN_USART3_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN3, 2)
 #define DMACHAN_USART3_TX       DMACHAN_SETTING(STM32L4_DMA1_CHAN2, 2)
 
 #define DMACHAN_UART4_RX        DMACHAN_SETTING(STM32L4_DMA2_CHAN5, 2)
diff --git a/arch/arm/src/stm32l4/chip/stm32l4x6xx_dma.h b/arch/arm/src/stm32l4/chip/stm32l4x6xx_dma.h
index 173e0adbe7..8ff0edfca2 100644
--- a/arch/arm/src/stm32l4/chip/stm32l4x6xx_dma.h
+++ b/arch/arm/src/stm32l4/chip/stm32l4x6xx_dma.h
@@ -489,7 +489,7 @@
 #define DMACHAN_USART2_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN6, 2)
 #define DMACHAN_USART2_TX       DMACHAN_SETTING(STM32L4_DMA1_CHAN7, 2)
 
-#define DMACHAN_USART3_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN3, 1)
+#define DMACHAN_USART3_RX       DMACHAN_SETTING(STM32L4_DMA1_CHAN3, 2)
 #define DMACHAN_USART3_TX       DMACHAN_SETTING(STM32L4_DMA1_CHAN2, 2)
 
 #define DMACHAN_UART5_RX        DMACHAN_SETTING(STM32L4_DMA2_CHAN2, 2)