diff --git a/sql/item.h b/sql/item.h
index a8b892292d3..db5010799fa 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -119,7 +119,7 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root)
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr,size_t size) {}
-  static void operator delete(void *ptr,size_t size, MEM_ROOT *mem_root) {}
+  static void operator delete(void *ptr, MEM_ROOT *mem_root) {}
 
   enum Type {FIELD_ITEM, FUNC_ITEM, SUM_FUNC_ITEM, STRING_ITEM,
 	     INT_ITEM, REAL_ITEM, NULL_ITEM, VARBIN_ITEM,
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index e11d8369f57..918e70fbc84 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -707,6 +707,8 @@ struct Item_change_record: public ilink
   Item *old_value;
   /* Placement new was hidden by `new' in ilink (TODO: check): */
   static void *operator new(size_t size, void *mem) { return mem; }
+  static void operator delete(void *ptr, size_t size) {}
+  static void operator delete(void *ptr, void *mem) { /* never called */ }
 };
 
 
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index 7cb71607edf..3e2f6a3f2b5 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -241,7 +241,7 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root)
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr,size_t size) {}
-  static void operator delete(void *ptr,size_t size, MEM_ROOT *mem_root) {}
+  static void operator delete(void *ptr, MEM_ROOT *mem_root) {}
   st_select_lex_node(): linkage(UNSPECIFIED_TYPE) {}
   virtual ~st_select_lex_node() {}
   inline st_select_lex_node* get_master() { return master; }
diff --git a/sql/sql_list.h b/sql/sql_list.h
index a607b31d60c..be3e29b0c62 100644
--- a/sql/sql_list.h
+++ b/sql/sql_list.h
@@ -41,8 +41,8 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root)
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr, size_t size) { TRASH(ptr, size); }
-  static void operator delete(void *ptr, size_t size, MEM_ROOT *mem_root)
-  { TRASH(ptr, size); }
+  static void operator delete(void *ptr, MEM_ROOT *mem_root)
+  { /* never called */ }
   static void operator delete[](void *ptr, size_t size) { TRASH(ptr, size); }
 #ifdef HAVE_purify
   bool dummy;
diff --git a/sql/sql_string.h b/sql/sql_string.h
index 9136dddbbf2..3ad4689cf36 100644
--- a/sql/sql_string.h
+++ b/sql/sql_string.h
@@ -73,7 +73,7 @@ public:
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr_arg,size_t size)
     {}
-  static void operator delete(void *ptr_arg,size_t size, MEM_ROOT *mem_root)
+  static void operator delete(void *ptr_arg, MEM_ROOT *mem_root)
     {}
   ~String() { free(); }