diff --git a/docs/en_US/release_notes_3_6.rst b/docs/en_US/release_notes_3_6.rst
index b14de432a..9cc0f9043 100644
--- a/docs/en_US/release_notes_3_6.rst
+++ b/docs/en_US/release_notes_3_6.rst
@@ -20,4 +20,5 @@ Bug fixes
 | `Bug #3629 <https://redmine.postgresql.org/issues/3629>`_ - Allow use of 0 (integer) and empty strings as parameters in the debugger.
 | `Bug #3723 <https://redmine.postgresql.org/issues/3723>`_ - Properly report errors when debugging cannot be started.
 | `Bug #3736 <https://redmine.postgresql.org/issues/3736>`_ - Fix toggle breakpoints buttons in the debugger.
+| `Bug #3742 <https://redmine.postgresql.org/issues/3742>`_ - Fix changes to the NOT NULL and default value options in the Table Dialogue.
 | `Bug #3746 <https://redmine.postgresql.org/issues/3746>`_ - Fix dropping of multiple functions/procedures at once.
\ No newline at end of file
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/9.2_plus/update.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/9.2_plus/update.sql
index d7b9d7e89..7c2bfd698 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/9.2_plus/update.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/9.2_plus/update.sql
@@ -9,7 +9,7 @@ ALTER TABLE {{conn|qtIdent(data.schema, data.table)}}
 
 {% endif %}
 {###  Alter column type and collation ###}
-{% if (data.cltype and data.cltype != o_data.cltype) or (data.attlen is defined and data.attlen != o_data.attlen) or (data.attprecision is defined and data.attprecision != o_data.attprecision) or (data.collspcname and data.collspcname != o_data.collspcname)%}
+{% if (data.cltype and data.cltype != o_data.cltype) or (data.attlen is defined and data.attlen is not none and data.attlen != o_data.attlen) or (data.attprecision is defined and data.attprecision != o_data.attprecision) or (data.collspcname and data.collspcname != o_data.collspcname)%}
 ALTER TABLE {{conn|qtIdent(data.schema, data.table)}}
     ALTER COLUMN {% if data.name %}{{conn|qtTypeIdent(data.name)}}{% else %}{{conn|qtTypeIdent(o_data.name)}}{% endif %} TYPE {{ GET_TYPE.UPDATE_TYPE_SQL(conn, data, o_data) }}{% if data.collspcname and data.collspcname != o_data.collspcname %}
  COLLATE {{data.collspcname}}{% elif o_data.collspcname %} COLLATE {{o_data.collspcname}}{% endif %};
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/default/update.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/default/update.sql
index 681444502..63c822ede 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/default/update.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/column/sql/default/update.sql
@@ -9,7 +9,7 @@ ALTER TABLE {{conn|qtIdent(data.schema, data.table)}}
 
 {% endif %}
 {###  Alter column type and collation ###}
-{% if (data.cltype and data.cltype != o_data.cltype) or (data.attlen is defined and data.attlen != o_data.attlen) or (data.attprecision is defined and data.attprecision != o_data.attprecision)  or (data.collspcname and data.collspcname != o_data.collspcname) %}
+{% if (data.cltype and data.cltype != o_data.cltype) or (data.attlen is defined and data.attlen is not none and data.attlen != o_data.attlen) or (data.attprecision is defined and data.attprecision != o_data.attprecision)  or (data.collspcname and data.collspcname != o_data.collspcname) %}
 ALTER TABLE {{conn|qtIdent(data.schema, data.table)}}
     ALTER COLUMN {% if data.name %}{{conn|qtTypeIdent(data.name)}}{% else %}{{conn|qtTypeIdent(o_data.name)}}{% endif %} TYPE {{ GET_TYPE.UPDATE_TYPE_SQL(conn, data, o_data) }}{% if data.collspcname and data.collspcname != o_data.collspcname %}
  COLLATE {{data.collspcname}}{% elif o_data.collspcname %} COLLATE {{o_data.collspcname}}{% endif %};