diff --git a/src/platforms/stm32/usbuart.c b/src/platforms/stm32/usbuart.c
index 05b57df..786bbc3 100644
--- a/src/platforms/stm32/usbuart.c
+++ b/src/platforms/stm32/usbuart.c
@@ -31,7 +31,7 @@
 #include "general.h"
 #include "cdcacm.h"
 
-#ifdef STM32F4
+#ifdef DMA_STREAM0
 #define dma_channel_reset(dma, channel) dma_stream_reset(dma, channel)
 #define dma_enable_channel(dma, channel) dma_enable_stream(dma, channel)
 #define dma_disable_channel(dma, channel) dma_disable_stream(dma, channel)
@@ -125,7 +125,7 @@ void usbuart_init(void)
 	dma_set_memory_size(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN, DMA_MSIZE_8BIT);
 	dma_set_priority(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN, DMA_PL_HIGH);
 	dma_enable_transfer_complete_interrupt(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN);
-#ifdef STM32F4
+#ifdef DMA_STREAM0
 	dma_set_transfer_mode(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN, DMA_SxCR_DIR_MEM_TO_PERIPHERAL);
 	dma_channel_select(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN, USBUSART_DMA_TRG);
 	dma_set_dma_flow_control(USBUSART_DMA_BUS, USBUSART_DMA_TX_CHAN);
@@ -146,7 +146,7 @@ void usbuart_init(void)
 	dma_set_priority(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN, DMA_PL_HIGH);
 	dma_enable_half_transfer_interrupt(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN);
 	dma_enable_transfer_complete_interrupt(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN);
-#ifdef STM32F4
+#ifdef DMA_STREAM0
 	dma_set_transfer_mode(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN, DMA_SxCR_DIR_PERIPHERAL_TO_MEM);
 	dma_channel_select(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN, USBUSART_DMA_TRG);
 	dma_set_dma_flow_control(USBUSART_DMA_BUS, USBUSART_DMA_RX_CHAN);