diff --git a/InvenTree/order/migrations/0054_salesorderallocation_shipment.py b/InvenTree/order/migrations/0054_salesorderallocation_shipment.py
new file mode 100644
index 0000000000..cfb74dd859
--- /dev/null
+++ b/InvenTree/order/migrations/0054_salesorderallocation_shipment.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.2.5 on 2021-10-25 06:42
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0053_salesordershipment'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='salesorderallocation',
+            name='shipment',
+            field=models.ForeignKey(blank=True, help_text='Sales order shipment reference', null=True, on_delete=django.db.models.deletion.CASCADE, to='order.salesordershipment', verbose_name='Shipment'),
+        ),
+    ]
diff --git a/InvenTree/order/models.py b/InvenTree/order/models.py
index be75cf9821..0566ec9312 100644
--- a/InvenTree/order/models.py
+++ b/InvenTree/order/models.py
@@ -973,6 +973,7 @@ class SalesOrderAllocation(models.Model):
 
     Attributes:
         line: SalesOrderLineItem reference
+        shipment: SalesOrderShipment reference
         item: StockItem reference
         quantity: Quantity to take from the StockItem
 
@@ -1028,6 +1029,11 @@ class SalesOrderAllocation(models.Model):
         if self.item.serial and not self.quantity == 1:
             errors['quantity'] = _('Quantity must be 1 for serialized stock item')
 
+
+
+        # TODO: Ensure that the "shipment" points to the same "order"!
+
+
         if len(errors) > 0:
             raise ValidationError(errors)
 
@@ -1037,6 +1043,14 @@ class SalesOrderAllocation(models.Model):
         verbose_name=_('Line'),
         related_name='allocations')
 
+    shipment = models.ForeignKey(
+        SalesOrderShipment,
+        on_delete=models.CASCADE,
+        null=True, blank=True,
+        verbose_name=_('Shipment'),
+        help_text=_('Sales order shipment reference'),
+    )
+
     item = models.ForeignKey(
         'stock.StockItem',
         on_delete=models.CASCADE,
diff --git a/InvenTree/users/models.py b/InvenTree/users/models.py
index d31f2a9905..88052fd40d 100644
--- a/InvenTree/users/models.py
+++ b/InvenTree/users/models.py
@@ -132,9 +132,10 @@ class RuleSet(models.Model):
         'sales_order': [
             'company_company',
             'order_salesorder',
+            'order_salesorderallocation',
             'order_salesorderattachment',
             'order_salesorderlineitem',
-            'order_salesorderallocation',
+            'order_salesordershipment',
         ]
     }