diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index f930b04e995b0ac5fcc542ec152317eede4de8b3..630a8262023ae52ca0b0dce319b649eac7908194 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -474,18 +474,18 @@ static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
 {
     S390PCIBusDevice *pbdev;
     uint32_t io_int_word;
-    uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
+    uint32_t idx = data >> ZPCI_MSI_VEC_BITS;
     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
     uint64_t ind_bit;
     uint32_t sum_bit;
     uint32_t e = 0;
 
-    DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec);
+    DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, idx, vec);
 
-    pbdev = s390_pci_find_dev_by_fid(fid);
+    pbdev = s390_pci_find_dev_by_idx(idx);
     if (!pbdev) {
         e |= (vec << ERR_EVENT_MVN_OFFSET);
-        s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e);
+        s390_pci_generate_error_event(ERR_EVENT_NOMSI, idx, 0, addr, e);
         return;
     }
 
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 37572df821dab3adb66bccece0264442b2754ad4..331bc4cfded95f303621dbfb5eb624e0e4c41f8f 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -419,7 +419,8 @@ static void update_msix_table_msg_data(S390PCIBusDevice *pbdev, uint64_t offset,
 
     msg_data = (uint8_t *)data - offset % PCI_MSIX_ENTRY_SIZE +
                PCI_MSIX_ENTRY_VECTOR_CTRL;
-    val = pci_get_long(msg_data) | (pbdev->fid << ZPCI_MSI_VEC_BITS);
+    val = pci_get_long(msg_data) |
+        ((pbdev->fh & FH_MASK_INDEX) << ZPCI_MSI_VEC_BITS);
     pci_set_long(msg_data, val);
     DPRINTF("update msix msg_data to 0x%" PRIx64 "\n", *data);
 }
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 45e94ca48abd81e86a14bac522ec37e93ebe1e95..2991bff6a448dd7c6647ad96dd4d8667e78afaee 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -2246,10 +2246,10 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
                              uint64_t address, uint32_t data, PCIDevice *dev)
 {
     S390PCIBusDevice *pbdev;
-    uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
+    uint32_t idx = data >> ZPCI_MSI_VEC_BITS;
     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
 
-    pbdev = s390_pci_find_dev_by_fid(fid);
+    pbdev = s390_pci_find_dev_by_idx(idx);
     if (!pbdev) {
         DPRINTF("add_msi_route no dev\n");
         return -ENODEV;