diff --git a/mysql-test/r/sp.result b/mysql-test/r/sp.result
index c75bce6580f..4468991c0ef 100644
--- a/mysql-test/r/sp.result
+++ b/mysql-test/r/sp.result
@@ -4821,6 +4821,17 @@ begin
 declare x int;
 select id from t1 order by x;
 end|
+drop procedure if exists bug14945|
+create table t3 (id int not null auto_increment primary key)|
+create procedure bug14945() deterministic truncate t3|
+insert into t3 values (null)|
+call bug14945()|
+insert into t3 values (null)|
+select * from t3|
+id
+1
+drop table t3|
+drop procedure bug14945|
 create procedure bug16474_2(x int)
 select id from t1 order by x|
 call bug16474_1()|
diff --git a/mysql-test/t/sp.test b/mysql-test/t/sp.test
index fe306126e45..29e657004ed 100644
--- a/mysql-test/t/sp.test
+++ b/mysql-test/t/sp.test
@@ -5672,6 +5672,21 @@ begin
   select id from t1 order by x;
 end|
 
+# 
+# BUG#14945: Truncate table doesn't reset the auto_increment counter
+#
+--disable_warnings
+drop procedure if exists bug14945|
+--enable_warnings
+create table t3 (id int not null auto_increment primary key)|
+create procedure bug14945() deterministic truncate t3|
+insert into t3 values (null)|
+call bug14945()|
+insert into t3 values (null)|
+select * from t3|
+drop table t3|
+drop procedure bug14945|
+
 # This does NOT order by column index; variable is an expression.
 create procedure bug16474_2(x int)
   select id from t1 order by x|
diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc
index 181b91781d7..804270992e5 100644
--- a/sql/sql_delete.cc
+++ b/sql/sql_delete.cc
@@ -916,8 +916,7 @@ bool mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok)
       DBUG_RETURN(TRUE);
     }
     if (!ha_check_storage_engine_flag(ha_resolve_by_legacy_type(thd, table_type),
-                                      HTON_CAN_RECREATE)
-        || thd->lex->sphead)
+                                      HTON_CAN_RECREATE))
       goto trunc_by_del;
 
     if (lock_and_wait_for_table_name(thd, table_list))
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index c33257ff602..51d3cbbd41d 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -3387,7 +3387,7 @@ end_with_restore_list:
       Don't allow this within a transaction because we want to use
       re-generate table
     */
-    if ((thd->locked_tables && !lex->sphead) || thd->active_transaction())
+    if (thd->locked_tables || thd->active_transaction())
     {
       my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                  ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));