diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 623ca80528df9d8332318cea16c756e626470b20..45c8552ce7dc24f66dcc20b787f85ae1653cfb32 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1872,7 +1872,9 @@ struct _virDomainDef {
 
     virDomainOSDef os;
     char *emulator;
-    /* These three options are of type virTristateSwitch */
+    /* These three options are of type virTristateSwitch,
+     * except VIR_DOMAIN_FEATURE_CAPABILITIES that is of type
+     * virDomainCapabilitiesPolicy */
     int features[VIR_DOMAIN_FEATURE_LAST];
     int apic_eoi;
     int hyperv_features[VIR_DOMAIN_HYPERV_LAST];