diff --git a/CHANGELOG b/CHANGELOG
index b5230c7ceb..153cd17026 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Match also with parent categories
+
 Version 4.6.0 - 2017-10-30
 * Bug fixes (see mercurial logs for details)
 * Don't match product and category lines when product is empty
diff --git a/commission.py b/commission.py
index 81c3818ed6..120c66f3b1 100644
--- a/commission.py
+++ b/commission.py
@@ -141,10 +141,17 @@ class Plan(ModelSQL, ModelView):
 
     def compute(self, amount, product, pattern=None):
         'Compute commission amount for the amount'
+        def parents(categories):
+            for category in categories:
+                while category:
+                    yield category
+                    category = category.parent
+
         if pattern is None:
             pattern = {}
         if product:
-            pattern['categories'] = [c.id for c in product.categories_all]
+            pattern['categories'] = [
+                c.id for c in parents(product.categories_all)]
             pattern['product'] = product.id
         else:
             pattern['categories'] = []
diff --git a/tests/test_commission.py b/tests/test_commission.py
index fd30747fb7..ef218f6995 100644
--- a/tests/test_commission.py
+++ b/tests/test_commission.py
@@ -63,6 +63,8 @@ class CommissionTestCase(ModuleTestCase):
 
         category = Category(name="Category")
         category.save()
+        child_category = Category(name="Child Category", parent=category)
+        child_category.save()
 
         company = create_company()
         with set_company(company):
@@ -83,6 +85,11 @@ class CommissionTestCase(ModuleTestCase):
 
             self.assertEqual(plan.compute(Decimal(1), product), Decimal(1))
 
+            template.categories = [child_category]
+            template.save()
+
+            self.assertEqual(plan.compute(Decimal(1), product), Decimal('0.8'))
+
     @with_transaction()
     def test_plan_no_product(self):
         "Test plan with no product"