Index: head/usr.sbin/bhyve/pci_passthru.c
===================================================================
--- head/usr.sbin/bhyve/pci_passthru.c
+++ head/usr.sbin/bhyve/pci_passthru.c
@@ -295,7 +295,7 @@
 	int index;
 
 	pi = sc->psc_pi;
-	if (offset >= pi->pi_msix.pba_offset &&
+	if (pi->pi_msix.pba_page != NULL && offset >= pi->pi_msix.pba_offset &&
 	    offset < pi->pi_msix.pba_offset + pi->pi_msix.pba_size) {
 		switch(size) {
 		case 1:
@@ -374,7 +374,7 @@
 	int index;
 
 	pi = sc->psc_pi;
-	if (offset >= pi->pi_msix.pba_offset &&
+	if (pi->pi_msix.pba_page != NULL && offset >= pi->pi_msix.pba_offset &&
 	    offset < pi->pi_msix.pba_offset + pi->pi_msix.pba_size) {
 		switch(size) {
 		case 1: