diff --git a/plinth/modules/matrixsynapse/__init__.py b/plinth/modules/matrixsynapse/__init__.py
index 5ccad4940..b9e377bd9 100644
--- a/plinth/modules/matrixsynapse/__init__.py
+++ b/plinth/modules/matrixsynapse/__init__.py
@@ -134,13 +134,12 @@ class MatrixSynapseTurnConsumer(TurnConsumer):
 
 def upgrade():
     """Upgrade matrix-synapse configuration to avoid conffile prompt."""
-    public_registration_status = privileged.public_registration('status')
+    config = privileged.get_config()
     privileged.move_old_conf()
     install(['matrix-synapse'], force_configuration='new', reinstall=True,
             force_missing_configuration=True)
     privileged.post_install()
-    if public_registration_status:
-        privileged.public_registration('enable')
+    privileged.set_config(**config)
 
 
 def setup_domain(domain_name):
diff --git a/plinth/modules/matrixsynapse/privileged.py b/plinth/modules/matrixsynapse/privileged.py
index f0620397c..847e4492e 100644
--- a/plinth/modules/matrixsynapse/privileged.py
+++ b/plinth/modules/matrixsynapse/privileged.py
@@ -69,36 +69,29 @@ def setup(domain_name: str):
                                   {'server-name': domain_name})
 
 
-@privileged
-def public_registration(command: str) -> Optional[bool]:
-    """Enable/Disable/Status public user registration."""
-    if command not in ('enable', 'disable', 'status'):
-        raise ValueError('Invalid command')
-
+def get_config():
+    """Return the current configuration of matrix-synapse."""
     try:
         with open(REGISTRATION_CONF_PATH, encoding='utf-8') as reg_conf_file:
             config = yaml.safe_load(reg_conf_file)
     except FileNotFoundError:
         # Check if its set in original conffile.
         with open(ORIG_CONF_PATH, encoding='utf-8') as orig_conf_file:
-            orig_config = yaml.safe_load(orig_conf_file)
-            config = {
-                'enable_registration':
-                    orig_config.get('enable_registration', False)
-            }
+            config = yaml.safe_load(orig_conf_file)
 
-    if command == 'status':
-        return bool(config['enable_registration'])
-    elif command == 'enable':
-        config['enable_registration'] = True
-    elif command == 'disable':
-        config['enable_registration'] = False
+    return {
+        'public_registration': bool(config.get('enable_registration', False)),
+    }
 
+
+@privileged
+def set_config(public_registration: bool):
+    """Enable/disable public user registration."""
+    config = {'enable_registration': public_registration}
     with open(REGISTRATION_CONF_PATH, 'w', encoding='utf-8') as reg_conf_file:
         yaml.dump(config, reg_conf_file)
 
     action_utils.service_try_restart('matrix-synapse')
-    return None
 
 
 @privileged
diff --git a/plinth/modules/matrixsynapse/views.py b/plinth/modules/matrixsynapse/views.py
index ad47b6de7..858ab301c 100644
--- a/plinth/modules/matrixsynapse/views.py
+++ b/plinth/modules/matrixsynapse/views.py
@@ -69,7 +69,7 @@ class MatrixSynapseAppView(AppView):
         config, managed = get_turn_configuration()
         initial.update({
             'enable_public_registration':
-                privileged.public_registration('status'),
+                privileged.get_config()['public_registration'],
             'enable_managed_turn':
                 managed,
             'turn_uris':
@@ -79,14 +79,6 @@ class MatrixSynapseAppView(AppView):
         })
         return initial
 
-    @staticmethod
-    def _handle_public_registrations(new_config):
-
-        if new_config['enable_public_registration']:
-            privileged.public_registration('enable')
-        else:
-            privileged.public_registration('disable')
-
     @staticmethod
     def _handle_turn_configuration(old_config, new_config):
         if not new_config['enable_managed_turn']:
@@ -116,7 +108,8 @@ class MatrixSynapseAppView(AppView):
 
         is_changed = False
         if changed('enable_public_registration'):
-            self._handle_public_registrations(new_config)
+            privileged.set_config(
+                public_registration=new_config['enable_public_registration'])
             is_changed = True
 
         if changed('enable_managed_turn') or changed('turn_uris') or \
diff --git a/plinth/modules/mediawiki/views.py b/plinth/modules/mediawiki/views.py
index f08b5e789..173cd1937 100644
--- a/plinth/modules/mediawiki/views.py
+++ b/plinth/modules/mediawiki/views.py
@@ -28,7 +28,7 @@ class MediaWikiAppView(views.AppView):
         initial = super().get_initial()
         initial.update({
             'enable_public_registrations':
-                privileged.public_registrations('status'),
+                privileged.get_config()['public_registration'],
             'enable_private_mode':
                 privileged.private_mode('status'),
             'default_skin':