diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index fef32dbb69d265700c3ce66d27ed3801390774a8..3226dc9607b47598425a727261ac844a6421b985 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -3703,7 +3703,7 @@ get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part,
 
   /*
     We need to restore the runtime mem_root of the thread in this
-    function becuase it evaluates the value of its argument, while
+    function because it evaluates the value of its argument, while
     the argument can be any, e.g. a subselect. The subselect
     items, in turn, assume that all the memory allocated during
     the evaluation has the same life span as the item itself.
diff --git a/sql/sp_head.cc b/sql/sp_head.cc
index 825ec34e410047c5360a43b74dc616eb29ee9712..d075c86f8cd11937e572b52d0dbf08048b6d9678 100644
--- a/sql/sp_head.cc
+++ b/sql/sp_head.cc
@@ -1474,13 +1474,6 @@ sp_lex_keeper::reset_lex_and_exec_core(THD *thd, uint *nextp,
     they want to store some value in local variable, pass return value and
     etc... So their life time should be longer than one instruction.
 
-    Probably we can call destructors for most of them then we are leaving
-    routine. But this won't help much as they are allocated in main query
-    MEM_ROOT anyway. So they all go to global thd->free_list.
-
-    May be we can use some other MEM_ROOT for this purprose ???
-
-    What else should we do for cleanup ?
     cleanup_items() is called in sp_head::execute()
   */
   return res;