diff --git a/src/nm-ip4-config.h b/src/nm-ip4-config.h
index a69af7e795..ae9d2eeb25 100644
--- a/src/nm-ip4-config.h
+++ b/src/nm-ip4-config.h
@@ -41,7 +41,10 @@ typedef struct {
 	GObjectClass parent;
 } NMIP4ConfigClass;
 
+/* internal */
 #define NM_IP4_CONFIG_IFINDEX "ifindex"
+
+/* public*/
 #define NM_IP4_CONFIG_ADDRESS_DATA "address-data"
 #define NM_IP4_CONFIG_ROUTE_DATA "route-data"
 #define NM_IP4_CONFIG_GATEWAY "gateway"
diff --git a/src/nm-ip6-config.h b/src/nm-ip6-config.h
index bf64fc26ac..563e9f00b3 100644
--- a/src/nm-ip6-config.h
+++ b/src/nm-ip6-config.h
@@ -42,7 +42,10 @@ typedef struct {
 	GObjectClass parent;
 } NMIP6ConfigClass;
 
+/* internal */
 #define NM_IP6_CONFIG_IFINDEX "ifindex"
+
+/* public */
 #define NM_IP6_CONFIG_ADDRESS_DATA "address-data"
 #define NM_IP6_CONFIG_ROUTE_DATA "route-data"
 #define NM_IP6_CONFIG_GATEWAY "gateway"