diff --git a/src/rp2040/hardware_structs/include/hardware/structs/dma.h b/src/rp2040/hardware_structs/include/hardware/structs/dma.h
index 0d20641..4281ddf 100644
--- a/src/rp2040/hardware_structs/include/hardware/structs/dma.h
+++ b/src/rp2040/hardware_structs/include/hardware/structs/dma.h
@@ -194,8 +194,8 @@ typedef struct {
     } ch[NUM_DMA_CHANNELS];
 } dma_debug_hw_t;
 
-#define dma_hw ((dma_hw_t *const)DMA_BASE)
-#define dma_debug_hw ((dma_debug_hw_t *const)(DMA_BASE + DMA_CH0_DBG_CTDREQ_OFFSET))
+#define dma_hw ((dma_hw_t *)DMA_BASE)
+#define dma_debug_hw ((dma_debug_hw_t *)(DMA_BASE + DMA_CH0_DBG_CTDREQ_OFFSET))
 
 static_assert( NUM_DMA_TIMERS == 4, "");
 static_assert( NUM_DMA_CHANNELS == 12, "");