diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index e0b19a238af0779d6e28d2588f4fb5cc38bac994..bf201e7a4d8f0166ab2b403e308f04bc99e60ca9 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -591,7 +591,7 @@ virDomainPCIAddressReserveSlot(virDomainPCIAddressSetPtr addrs,
                                virPCIDeviceAddressPtr addr,
                                virDomainPCIConnectFlags flags)
 {
-    return virDomainPCIAddressReserveAddr(addrs, addr, flags, false);
+    return virDomainPCIAddressReserveAddr(addrs, addr, flags, true);
 }
 
 int
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index d77a792d7c3e7af4f760c3110d7d430f3f6817ad..69a64fdac54a870f0c7e7efd82e43a1dad5b9d1a 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -1348,7 +1348,7 @@ qemuDomainValidateDevicePCISlotsQ35(virDomainDefPtr def,
                 tmp_addr.slot = 0x1E;
                 if (!virDomainPCIAddressSlotInUse(addrs, &tmp_addr)) {
                     if (virDomainPCIAddressReserveAddr(addrs, &tmp_addr,
-                                                       flags, false) < 0)
+                                                       flags, true) < 0)
                         goto cleanup;
                     cont->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
                     cont->info.addr.pci.domain = 0;
@@ -1372,12 +1372,12 @@ qemuDomainValidateDevicePCISlotsQ35(virDomainDefPtr def,
         tmp_addr.function = 0;
         tmp_addr.multi = VIR_TRISTATE_SWITCH_ON;
         if (virDomainPCIAddressReserveAddr(addrs, &tmp_addr,
-                                           flags, false) < 0)
+                                           flags, true) < 0)
            goto cleanup;
         tmp_addr.function = 3;
         tmp_addr.multi = VIR_TRISTATE_SWITCH_ABSENT;
         if (virDomainPCIAddressReserveAddr(addrs, &tmp_addr,
-                                           flags, false) < 0)
+                                           flags, true) < 0)
            goto cleanup;
     }