diff --git a/libnm-core/nm-core-internal.h b/libnm-core/nm-core-internal.h
index 86a301bd1b..8f21e8fe36 100644
--- a/libnm-core/nm-core-internal.h
+++ b/libnm-core/nm-core-internal.h
@@ -122,6 +122,7 @@ char **     _nm_utils_strsplit_set (const char *str,
 
 char *nm_utils_uuid_generate_from_string (const char *s, gssize slen, int uuid_type, gpointer type_args);
 
+/* arbitrarily choosen namespace UUID for _nm_utils_uuid_generate_from_strings() */
 #define NM_UTILS_UUID_NS "b425e9fb-7598-44b4-9e3b-5a2e3aaa4905"
 
 char *_nm_utils_uuid_generate_from_strings (const char *string1, ...) G_GNUC_NULL_TERMINATED;