diff --git a/os/hal/platforms/STM32F2xx/stm32_dma.h b/os/hal/platforms/STM32F2xx/stm32_dma.h
index b5f95f0c8..d57cae4be 100644
--- a/os/hal/platforms/STM32F2xx/stm32_dma.h
+++ b/os/hal/platforms/STM32F2xx/stm32_dma.h
@@ -54,7 +54,7 @@
  *                      nibble
  * @return              Returns the channel associated to the stream.
  */
-#define STM32_DMA_GETCHANNEL(id, c) (((c) & 15) >> (((id) & 7) * 4))
+#define STM32_DMA_GETCHANNEL(id, c) ((c) >> (((id) & 7) * 4))
 
 /**
  * @brief   Returns an unique numeric identifier for a DMA stream.
diff --git a/os/hal/platforms/STM32F4xx/stm32_dma.h b/os/hal/platforms/STM32F4xx/stm32_dma.h
index 16dcea02d..bcadf153c 100644
--- a/os/hal/platforms/STM32F4xx/stm32_dma.h
+++ b/os/hal/platforms/STM32F4xx/stm32_dma.h
@@ -54,7 +54,7 @@
  *                      nibble
  * @return              Returns the channel associated to the stream.
  */
-#define STM32_DMA_GETCHANNEL(id, c) (((c) & 15) >> (((id) & 7) * 4))
+#define STM32_DMA_GETCHANNEL(id, c) ((c) >> (((id) & 7) * 4))
 
 /**
  * @brief   Returns an unique numeric identifier for a DMA stream.