diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 368f16f3fb..a04f96169c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -700,7 +700,7 @@ typedef enum {
 } virDomainControllerModelPCI;
 
 typedef enum {
-    VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_NONE,
+    VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_NONE = 0,
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PCI_BRIDGE,
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_I82801B11_BRIDGE,
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_IOH3420,