diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index f72d76c178..3feb6c3a1f 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -1121,15 +1121,17 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size)
 
     switch (offset & ~0x3) {
     case SDHC_SYSAD:
-        s->sdmasysad = (s->sdmasysad & mask) | value;
-        MASKED_WRITE(s->sdmasysad, mask, value);
-        /* Writing to last byte of sdmasysad might trigger transfer */
-        if (!(mask & 0xFF000000) && TRANSFERRING_DATA(s->prnsts) && s->blkcnt &&
-                s->blksize && SDHC_DMA_TYPE(s->hostctl1) == SDHC_CTRL_SDMA) {
-            if (s->trnmod & SDHC_TRNS_MULTI) {
-                sdhci_sdma_transfer_multi_blocks(s);
-            } else {
-                sdhci_sdma_transfer_single_block(s);
+        if (!TRANSFERRING_DATA(s->prnsts)) {
+            s->sdmasysad = (s->sdmasysad & mask) | value;
+            MASKED_WRITE(s->sdmasysad, mask, value);
+            /* Writing to last byte of sdmasysad might trigger transfer */
+            if (!(mask & 0xFF000000) && s->blkcnt && s->blksize &&
+                SDHC_DMA_TYPE(s->hostctl1) == SDHC_CTRL_SDMA) {
+                if (s->trnmod & SDHC_TRNS_MULTI) {
+                    sdhci_sdma_transfer_multi_blocks(s);
+                } else {
+                    sdhci_sdma_transfer_single_block(s);
+                }
             }
         }
         break;