diff --git a/esp-hal/src/dma/mod.rs b/esp-hal/src/dma/mod.rs
index ce3950cee0..bb7d4af1d9 100644
--- a/esp-hal/src/dma/mod.rs
+++ b/esp-hal/src/dma/mod.rs
@@ -577,7 +577,7 @@ macro_rules! dma_circular_descriptors_chunk_size {
 /// use esp_hal::dma::DmaBufBlkSize;
 ///
 /// let tx_buf =
-///     dma_tx_buffer!(32000, Some(DmaBufBlkSize::Size32));
+///     dma_tx_buffer!(32000);
 /// # }
 /// ```
 #[macro_export]