diff --git a/usr.sbin/bhyve/pci_emul.c b/usr.sbin/bhyve/pci_emul.c
index c6763c93c018..1e45bad133f2 100644
--- a/usr.sbin/bhyve/pci_emul.c
+++ b/usr.sbin/bhyve/pci_emul.c
@@ -2054,6 +2054,7 @@ pci_emul_dior(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, int baridx,
 			return (0);
 		}
 	
+		value = 0;
 		if (size == 1) {
 			value = sc->ioregs[offset];
 		} else if (size == 2) {