diff --git a/tests/libqos/pci.c b/tests/libqos/pci.c
index bf1c53240b..98a2e56569 100644
--- a/tests/libqos/pci.c
+++ b/tests/libqos/pci.c
@@ -350,6 +350,11 @@ void qpci_iounmap(QPCIDevice *dev, void *data)
     /* FIXME */
 }
 
+void *qpci_legacy_iomap(QPCIDevice *dev, uint16_t addr)
+{
+    return (void *)(uintptr_t)addr;
+}
+
 void qpci_plug_device_test(const char *driver, const char *id,
                            uint8_t slot, const char *opts)
 {
diff --git a/tests/libqos/pci.h b/tests/libqos/pci.h
index f6f916dca7..b6f855e3b6 100644
--- a/tests/libqos/pci.h
+++ b/tests/libqos/pci.h
@@ -94,6 +94,7 @@ void qpci_io_writel(QPCIDevice *dev, void *data, uint32_t value);
 
 void *qpci_iomap(QPCIDevice *dev, int barno, uint64_t *sizeptr);
 void qpci_iounmap(QPCIDevice *dev, void *data);
+void *qpci_legacy_iomap(QPCIDevice *dev, uint16_t addr);
 
 void qpci_plug_device_test(const char *driver, const char *id,
                            uint8_t slot, const char *opts);