diff --git a/hw/scsi/esp-pci.c b/hw/scsi/esp-pci.c
index 4e890db0e2..ac5d752876 100644
--- a/hw/scsi/esp-pci.c
+++ b/hw/scsi/esp-pci.c
@@ -275,7 +275,7 @@ static void esp_pci_dma_memory_rw(PCIESPState *pci, uint8_t *buf, int len,
         qemu_log_mask(LOG_UNIMP, "am53c974: MDL transfer not implemented\n");
     }
 
-    addr = pci->dma_regs[DMA_SPA];
+    addr = pci->dma_regs[DMA_WAC];
     if (pci->dma_regs[DMA_WBC] < len) {
         len = pci->dma_regs[DMA_WBC];
     }