diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index bb115b9d548..96d94127316 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -80,7 +80,7 @@ static int check_insert_fields(THD *thd, TABLE *table, List<Item> &fields,
 	check_grant_all_columns(thd,INSERT_ACL,table))
       return -1;
 #endif
-    (int) table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_INSERT;
+    *(int*)&table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_INSERT;
   }
   else
   {						// Part field list
@@ -110,7 +110,7 @@ static int check_insert_fields(THD *thd, TABLE *table, List<Item> &fields,
     }
     if (table->timestamp_field &&	// Don't set timestamp if used
 	table->timestamp_field->query_id == thd->query_id)
-      (int) table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_INSERT;
+      *(int*)&table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_INSERT;
   }
   // For the values we need select_priv
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
@@ -167,7 +167,7 @@ static int check_update_fields(THD *thd, TABLE *table,
   {
     /* Don't set timestamp column if this is modified. */
     if (table->timestamp_field->query_id == thd->query_id)
-      (int) table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_UPDATE;
+    *(int*)&table->timestamp_field_type&= ~ (int) TIMESTAMP_AUTO_SET_ON_UPDATE;
     else
       table->timestamp_field->query_id= timestamp_query_id;
   }