diff -r 0923c036b913 -r f819fe5e20f5 src/ucx/list.h
--- a/src/ucx/list.h	Tue Jan 23 19:23:34 2018 +0100
+++ b/src/ucx/list.h	Wed May 02 16:14:40 2018 +0200
@@ -173,9 +173,11 @@
  * 
  * Note, that the contents are not usable afterwards and the list should be
  * destroyed with ucx_list_free().
+ *
+ * If no destructor is specified (<code>NULL</code>), stdlib's free() is used.
  * 
  * @param list the list for which the contents shall be freed
- * @param destr the destructor function (e.g. stdlib free())
+ * @param destr optional destructor function
  * @see ucx_list_free()
  */
 void ucx_list_free_content(UcxList* list, ucx_destructor destr);