-gboolean prop_get_string_locale(Window win, Atom prop, char **ret);
-gboolean prop_get_string_utf8(Window win, Atom prop, char **ret);
-gboolean prop_get_strings_locale(Window win, Atom prop, char ***ret);
-gboolean prop_get_strings_utf8(Window win, Atom prop, char ***ret);
+gboolean prop_get_string_locale(Window win, Atom prop, gchar **ret);
+gboolean prop_get_string_utf8(Window win, Atom prop, gchar **ret);
+gboolean prop_get_strings_locale(Window win, Atom prop, gchar ***ret);
+gboolean prop_get_strings_utf8(Window win, Atom prop, gchar ***ret);