diff --git a/clients/common/nm-meta-setting-desc.h b/clients/common/nm-meta-setting-desc.h
index 27ae4254b1..1ec0e0d9da 100644
--- a/clients/common/nm-meta-setting-desc.h
+++ b/clients/common/nm-meta-setting-desc.h
@@ -523,7 +523,7 @@ struct _NMMetaPropertyTypDataNested  {
 	guint nested_len;
 };
 
-const NMMetaPropertyTypDataNested nm_meta_property_typ_data_bond;
+extern const NMMetaPropertyTypDataNested nm_meta_property_typ_data_bond;
 
 /*****************************************************************************/