diff --git a/myisam/mi_key.c b/myisam/mi_key.c
index 4cabfc91197..0ee34c2f41e 100644
--- a/myisam/mi_key.c
+++ b/myisam/mi_key.c
@@ -241,8 +241,8 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
       if (!(*key++= (char) 1-*old++))			/* Copy null marker */
       {
 	k_length-=length;
-        if (keyseg->flag & (HA_VAR_LENGTH_PART | HA_BLOB_PART))
-        {
+->flag & (HA_VAR_LENGTH_PART | HA_BLOB_PART))
+
           k_length-=2;                                  /* Skip length */
           old+= 2;
         }
diff --git a/mysql-test/r/create.result b/mysql-test/r/create.result
index 1f8c6cb464d..4c11f2b1925 100644
--- a/mysql-test/r/create.result
+++ b/mysql-test/r/create.result
@@ -1,4 +1,4 @@
-drop table if exists t1,t2,t3;
+drop table if exists t1,t2,t3,t4,t5;
 drop database if exists mysqltest;
 create table t1 (b char(0));
 insert into t1 values (""),(null);
@@ -654,3 +654,69 @@ t1	CREATE TABLE `t1` (
   PRIMARY KEY  (`a`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
+CREATE TABLE t2 (
+a int(11) default NULL
+);
+insert into t2 values(111);
+create table t1 ( 
+a varchar(12) charset utf8 collate utf8_bin not null, 
+b int not null, primary key (a)
+) select a, 1 as b from t2 ;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(12) character set utf8 collate utf8_bin NOT NULL default '',
+  `b` int(11) NOT NULL default '0',
+  PRIMARY KEY  (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1;
+create table t1 ( 
+a varchar(12) charset utf8 collate utf8_bin not null,
+b int not null, primary key (a)
+) select 'a' as a , 1 as b from t2 ;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(12) character set utf8 collate utf8_bin NOT NULL default '',
+  `b` int(11) NOT NULL default '0',
+  PRIMARY KEY  (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1;
+create table t1 ( 
+a varchar(12) charset utf8 collate utf8_bin,
+b int not null, primary key (a)
+) select 'a' as a , 1 as b from t2 ;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(12) character set utf8 collate utf8_bin NOT NULL default '',
+  `b` int(11) NOT NULL default '0',
+  PRIMARY KEY  (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1, t2;
+create table t1 ( 
+a1 int not null,
+a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+);
+insert into t1 values (1,1,1, 1,1,1, 1,1,1);
+create table t2 ( 
+a1 varchar(12) charset utf8 collate utf8_bin not null,
+a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int,
+primary key (a1)
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1 ;
+drop table t2;
+create table t2 ( 
+a1 varchar(12) charset utf8 collate utf8_bin,
+a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1;
+drop table t1, t2;
+create table t1 ( 
+a1 int, a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+);
+insert into t1 values (1,1,1, 1,1,1, 1,1,1);
+create table t2 ( 
+a1 varchar(12) charset utf8 collate utf8_bin not null,
+a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int,
+primary key (a1)
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1 ;
+drop table t1, t2;
diff --git a/mysql-test/r/myisam.result b/mysql-test/r/myisam.result
index b4265a99604..7da55b66376 100644
--- a/mysql-test/r/myisam.result
+++ b/mysql-test/r/myisam.result
@@ -701,6 +701,24 @@ t1	1	a	2	b	A	0	NULL	NULL	YES	BTREE
 t1	1	a	3	c	A	0	NULL	NULL	YES	BTREE	
 t1	1	a	4	d	A	0	NULL	NULL	YES	BTREE	
 set myisam_stats_method=DEFAULT;
+drop table t1;
+create table t1(
+cip INT NOT NULL,
+time TIME NOT NULL,
+score INT NOT NULL DEFAULT 0,
+bob TINYBLOB
+);
+insert into t1 (cip, time) VALUES (1, '00:01'), (2, '00:02'), (3,'00:03');
+insert into t1 (cip, bob, time) VALUES (4, 'a', '00:04'), (5, 'b', '00:05'), 
+(6, 'c', '00:06');
+select * from t1 where bob is null and cip=1;
+cip	time	score	bob
+1	00:01:00	0	NULL
+create index bug on t1 (bob(22), cip, time);
+select * from t1 where bob is null and cip=1;
+cip	time	score	bob
+1	00:01:00	0	NULL
+drop table t1;
 set storage_engine=MyISAM;
 drop table if exists t1,t2,t3;
 --- Testing varchar ---
diff --git a/mysql-test/t/create.test b/mysql-test/t/create.test
index 67ad3058153..375128f84b2 100644
--- a/mysql-test/t/create.test
+++ b/mysql-test/t/create.test
@@ -3,7 +3,7 @@
 #
 
 --disable_warnings
-drop table if exists t1,t2,t3;
+drop table if exists t1,t2,t3,t4,t5;
 drop database if exists mysqltest;
 --enable_warnings
 
@@ -554,4 +554,66 @@ create table t1 (
 show create table t1;
 drop table t1;
 
+#
+# BUG#14480: assert failure in CREATE ... SELECT because of wrong
+#            calculation of number of NULLs.
+#
+CREATE TABLE t2 (
+  a int(11) default NULL
+);
+insert into t2 values(111);
+
+create table t1 ( 
+  a varchar(12) charset utf8 collate utf8_bin not null, 
+  b int not null, primary key (a)
+) select a, 1 as b from t2 ;
+show create table t1;
+drop table t1;
+
+create table t1 ( 
+  a varchar(12) charset utf8 collate utf8_bin not null,
+  b int not null, primary key (a)
+) select 'a' as a , 1 as b from t2 ;
+show create table t1;
+drop table t1;
+
+create table t1 ( 
+  a varchar(12) charset utf8 collate utf8_bin,
+  b int not null, primary key (a)
+) select 'a' as a , 1 as b from t2 ;
+show create table t1;
+drop table t1, t2;
+
+create table t1 ( 
+  a1 int not null,
+  a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+);
+insert into t1 values (1,1,1, 1,1,1, 1,1,1);
+
+create table t2 ( 
+  a1 varchar(12) charset utf8 collate utf8_bin not null,
+  a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int,
+  primary key (a1)
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1 ;
+drop table t2;
+
+create table t2 ( 
+  a1 varchar(12) charset utf8 collate utf8_bin,
+  a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1;
+
+drop table t1, t2;
+create table t1 ( 
+  a1 int, a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int
+);
+insert into t1 values (1,1,1, 1,1,1, 1,1,1);
+
+create table t2 ( 
+  a1 varchar(12) charset utf8 collate utf8_bin not null,
+  a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int,
+  primary key (a1)
+) select a1,a2,a3,a4,a5,a6,a7,a8,a9 from t1 ;
+
+drop table t1, t2;
+
 # End of 4.1 tests
diff --git a/mysql-test/t/myisam.test b/mysql-test/t/myisam.test
index f15b4d54275..d510ef66677 100644
--- a/mysql-test/t/myisam.test
+++ b/mysql-test/t/myisam.test
@@ -648,6 +648,24 @@ analyze table t1;
 show index from t1;
 
 set myisam_stats_method=DEFAULT;
+drop table t1;
+
+# BUG#13814 - key value packed incorrectly for TINYBLOBs
+
+create table t1(
+  cip INT NOT NULL,
+  time TIME NOT NULL,
+  score INT NOT NULL DEFAULT 0,
+  bob TINYBLOB
+);
+
+insert into t1 (cip, time) VALUES (1, '00:01'), (2, '00:02'), (3,'00:03');
+insert into t1 (cip, bob, time) VALUES (4, 'a', '00:04'), (5, 'b', '00:05'), 
+                                       (6, 'c', '00:06');
+select * from t1 where bob is null and cip=1;
+create index bug on t1 (bob(22), cip, time);
+select * from t1 where bob is null and cip=1;
+drop table t1;
 # End of 4.1 tests
 
 #
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index fb190f5524f..a2dfe5f91b6 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -849,8 +849,15 @@ static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
           sql_field->key_length=	dup_field->key_length;
 	  sql_field->create_length_to_internal_length();
 	  sql_field->decimals=		dup_field->decimals;
-	  sql_field->flags=		dup_field->flags;
 	  sql_field->unireg_check=	dup_field->unireg_check;
+          /* 
+            We're making one field from two, the result field will have
+            dup_field->flags as flags. If we've incremented null_fields
+            because of sql_field->flags, decrement it back.
+          */
+          if (!(sql_field->flags & NOT_NULL_FLAG))
+            null_fields--;
+	  sql_field->flags=		dup_field->flags;
 	  it2.remove();			// Remove first (create) definition
 	  select_field_pos--;
 	  break;