diff --git a/plinth/modules/apache/components.py b/plinth/modules/apache/components.py
index d993d3235..77fa70239 100644
--- a/plinth/modules/apache/components.py
+++ b/plinth/modules/apache/components.py
@@ -44,7 +44,7 @@ class Webserver(app.LeaderComponent):
         self.kind = kind
         self.urls = urls or []
         self.expect_redirects = expect_redirects
-        self.last_updated_version = last_updated_version
+        self.last_updated_version = last_updated_version or 0
 
     def is_enabled(self):
         """Return whether the Apache configuration is enabled."""
diff --git a/plinth/modules/apache/tests/test_components.py b/plinth/modules/apache/tests/test_components.py
index 35a120c33..491452e61 100644
--- a/plinth/modules/apache/tests/test_components.py
+++ b/plinth/modules/apache/tests/test_components.py
@@ -109,6 +109,14 @@ def test_webserver_setup(service_reload, service_restart):
             return self.enabled
 
     app1 = AppTest()
+
+    # Don't fail when last_updated_version is not provided.
+    webserver1 = Webserver('test-webserver1', 'test-config')
+    assert webserver1.last_updated_version == 0
+    webserver1.setup(old_version=10)
+    service_reload.assert_not_called()
+    service_restart.assert_not_called()
+
     webserver1 = Webserver('test-webserver1', 'test-config',
                            last_updated_version=5)
     for version in (0, 5, 6):