diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c
index 27f9cc56af..e1a8a88c8c 100644
--- a/hw/pci/pcie_aer.c
+++ b/hw/pci/pcie_aer.c
@@ -774,7 +774,9 @@ void pcie_aer_root_write_config(PCIDevice *dev,
     uint32_t root_cmd = pci_get_long(aer_cap + PCI_ERR_ROOT_COMMAND);
     /* 6.2.4.1.2 Interrupt Generation */
     if (!msix_enabled(dev) && !msi_enabled(dev)) {
-        pci_set_irq(dev, !!(root_cmd & enabled_cmd));
+        if (pci_intx(dev) != -1) {
+            pci_set_irq(dev, !!(root_cmd & enabled_cmd));
+        }
         return;
     }