diff --git a/firmware/target/arm/as3525/sd-as3525.c b/firmware/target/arm/as3525/sd-as3525.c
index ff41ef6215..115f2f1f0d 100644
--- a/firmware/target/arm/as3525/sd-as3525.c
+++ b/firmware/target/arm/as3525/sd-as3525.c
@@ -669,9 +669,9 @@ static int sd_select_bank(signed char bank)
         dma_retain();
         /* we don't use the uncached buffer here, because we need the
          * physical memory address for DMA transfers */
-        dma_enable_channel(0, aligned_buffer, MCI_FIFO(INTERNAL_AS3525),
-            DMA_PERI_SD, DMAC_FLOWCTRL_PERI_MEM_TO_PERI, true, false, 0, DMA_S8,
-            NULL);
+        dma_enable_channel(0, AS3525_PHYSICAL_ADDR(&aligned_buffer[0]),
+            MCI_FIFO(INTERNAL_AS3525), DMA_PERI_SD,
+            DMAC_FLOWCTRL_PERI_MEM_TO_PERI, true, false, 0, DMA_S8, NULL);
 
         MCI_DATA_TIMER(INTERNAL_AS3525) = SD_MAX_WRITE_TIMEOUT;
         MCI_DATA_LENGTH(INTERNAL_AS3525) = 512;
@@ -790,7 +790,7 @@ static int sd_transfer_sectors(IF_MD2(int drive,) unsigned long start,
         }
         else
         {
-            dma_buf = aligned_buffer;
+            dma_buf = AS3525_PHYSICAL_ADDR(&aligned_buffer[0]);
             if(transfer > UNALIGNED_NUM_SECTORS)
                 transfer = UNALIGNED_NUM_SECTORS;
 
diff --git a/firmware/target/arm/as3525/sd-as3525v2.c b/firmware/target/arm/as3525/sd-as3525v2.c
index e8a0719b11..1c427b36f6 100644
--- a/firmware/target/arm/as3525/sd-as3525v2.c
+++ b/firmware/target/arm/as3525/sd-as3525v2.c
@@ -886,7 +886,7 @@ static int sd_transfer_sectors(IF_MD2(int drive,) unsigned long start,
         }
         else
         {
-            dma_buf = aligned_buffer;
+            dma_buf = AS3525(&aligned_buffer[0]);
             if(transfer > UNALIGNED_NUM_SECTORS)
                 transfer = UNALIGNED_NUM_SECTORS;