diff --git a/hw/opentitan/ot_dma.c b/hw/opentitan/ot_dma.c
index 9e7ba66c4c5f..e7455c6a2985 100644
--- a/hw/opentitan/ot_dma.c
+++ b/hw/opentitan/ot_dma.c
@@ -618,6 +618,7 @@ static bool ot_dma_go(OtDMAState *s)
     case TRANSACTION_WIDTH_HALF:
     case TRANSACTION_WIDTH_WORD:
         break;
+    default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: %s: Invalid transaction width for hashing\n",
                       __func__, s->dma_id);