diff --git a/os/hal/platforms/STM32F30x/hal_lld.h b/os/hal/platforms/STM32F30x/hal_lld.h
index 713640e48..3920e651f 100644
--- a/os/hal/platforms/STM32F30x/hal_lld.h
+++ b/os/hal/platforms/STM32F30x/hal_lld.h
@@ -341,9 +341,9 @@
 
 /* I2C attributes.*/
 #define STM32_HAS_I2C1          TRUE
-#define STM32_I2C1_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 6))
+#define STM32_I2C1_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 7))
 #define STM32_I2C1_RX_DMA_CHN   0x00000000
-#define STM32_I2C1_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 7))
+#define STM32_I2C1_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 6))
 #define STM32_I2C1_TX_DMA_CHN   0x00000000
 
 #define STM32_HAS_I2C2          TRUE