diff --git a/plinth/modules/ttrss/__init__.py b/plinth/modules/ttrss/__init__.py
index de9f53f3a..945f2bb6b 100644
--- a/plinth/modules/ttrss/__init__.py
+++ b/plinth/modules/ttrss/__init__.py
@@ -120,6 +120,11 @@ class TTRSSApp(app_module.App):
         if not old_version:
             self.enable()
 
+    def uninstall(self):
+        """De-configure and uninstall the app."""
+        privileged.uninstall()
+        super().uninstall()
+
     def force_upgrade(self, packages):
         """Force update package to resolve conffile prompts."""
         if 'tt-rss' not in packages:
diff --git a/plinth/modules/ttrss/privileged.py b/plinth/modules/ttrss/privileged.py
index 4d2526826..5af79a56f 100644
--- a/plinth/modules/ttrss/privileged.py
+++ b/plinth/modules/ttrss/privileged.py
@@ -171,3 +171,11 @@ def load_augeas():
     aug.set('/augeas/load/Phpvars/incl[last() + 1]', DATABASE_FILE)
     aug.load()
     return aug
+
+
+@privileged
+def uninstall():
+    """Ensure that the database is removed."""
+    # This setting set before deb package installation is not retrained,
+    # somehow.
+    action_utils.debconf_set_selections(['tt-rss tt-rss/purge boolean true'])