diff --git a/pattern_import_export/models/pattern_chunk.py b/pattern_import_export/models/pattern_chunk.py
index 23c0947b..e3fc948e 100644
--- a/pattern_import_export/models/pattern_chunk.py
+++ b/pattern_import_export/models/pattern_chunk.py
@@ -40,6 +40,7 @@ def run_import(self):
                     "model": model,
                     "record_ids": [],
                     "purge_one2many": self.pattern_file_id.pattern_config_id.purge_one2many,
+                    "pattern_file": self.pattern_file_id,
                 }
             )
             .env[model]
diff --git a/pattern_import_export_custom_header/__manifest__.py b/pattern_import_export_custom_header/__manifest__.py
index 575f7580..93e077ca 100644
--- a/pattern_import_export_custom_header/__manifest__.py
+++ b/pattern_import_export_custom_header/__manifest__.py
@@ -4,7 +4,7 @@
 
 {
     "name": "Pattern export custom header",
-    "summary": "Allow to use custom headers names in export files",
+    "summary": "Allow to use custom headers names in export or import files",
     "version": "14.0.1.0.1",
     "category": "Extra Tools",
     "website": "https://github.com/shopinvader/pattern-import-export",
diff --git a/pattern_import_export_custom_header/models/__init__.py b/pattern_import_export_custom_header/models/__init__.py
index 9d55f4ed..872d411f 100644
--- a/pattern_import_export_custom_header/models/__init__.py
+++ b/pattern_import_export_custom_header/models/__init__.py
@@ -1 +1,2 @@
 from . import pattern_config
+from . import base
diff --git a/pattern_import_export_custom_header/models/base.py b/pattern_import_export_custom_header/models/base.py
new file mode 100644
index 00000000..17f10f9a
--- /dev/null
+++ b/pattern_import_export_custom_header/models/base.py
@@ -0,0 +1,30 @@
+# Copyright (C) 2023 Akretion (<http://www.akretion.com>).
+# @author Chafique Delli <chafique.delli@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class Base(models.AbstractModel):
+    _inherit = "base"
+
+    def _pattern_format2json(self, row):
+        pattern_config_ctx = self._context.get("pattern_config")
+        if pattern_config_ctx:
+            pattern_file = pattern_config_ctx.get("pattern_file")
+            pattern_config = pattern_file.pattern_config_id
+            new_row = {}
+            for custom_header in pattern_config.custom_header_ids:
+                value = ""
+                if custom_header.custom_name and custom_header.custom_name in row:
+                    value = row[custom_header.custom_name]
+                elif (
+                    custom_header.initial_header_name
+                    and custom_header.initial_header_name in row
+                ):
+                    value = row[custom_header.initial_header_name]
+                if not value and custom_header.import_default_value:
+                    value = custom_header.import_default_value
+                new_row[custom_header.initial_header_name] = value
+            row = new_row
+        return super()._pattern_format2json(row=row)
diff --git a/pattern_import_export_custom_header/models/pattern_config.py b/pattern_import_export_custom_header/models/pattern_config.py
index f7d433cf..80fd045a 100644
--- a/pattern_import_export_custom_header/models/pattern_config.py
+++ b/pattern_import_export_custom_header/models/pattern_config.py
@@ -19,7 +19,7 @@ class PatternConfig(models.Model):
 
     def _map_with_custom_header(self, data):
         return {
-            item.name: data.get(item.initial_header_name)
+            item.name: data.get(item.initial_header_name) or item.export_default_value
             for item in self.custom_header_ids
         }
 
@@ -72,6 +72,8 @@ class PatternCustomHeader(models.Model):
     custom_name = fields.Char(string="Custom Header Name")
     initial_header_name = fields.Char(string="Initial Header Name")
     pattern_id = fields.Many2one("pattern.config", required=True)
+    import_default_value = fields.Char(string="Import default Value")
+    export_default_value = fields.Char(string="Export default Value")
 
     def _compute_name(self):
         for record in self:
diff --git a/pattern_import_export_custom_header/views/pattern_config.xml b/pattern_import_export_custom_header/views/pattern_config.xml
index 292dbf36..824e308f 100644
--- a/pattern_import_export_custom_header/views/pattern_config.xml
+++ b/pattern_import_export_custom_header/views/pattern_config.xml
@@ -30,6 +30,8 @@
                                 name="custom_name"
                                 attrs="{'required': [('initial_header_name', '=', False)]}"
                             />
+                            <field name="import_default_value" />
+                            <field name="export_default_value" />
                         </tree>
                     </field>
                 </page>