diff --git a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
index 28894fb55..c9b8a8cfc 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
@@ -526,8 +526,10 @@ public class SettingsController extends BaseController {
 
     @Override
     public void onDestroy() {
-        appPreferences.unregisterProxyTypeListener(proxyTypeChangeListener);
-        appPreferences.unregisterProxyCredentialsListener(proxyCredentialsChangeListener);
+        if (appPreferences != null) {
+            appPreferences.unregisterProxyTypeListener(proxyTypeChangeListener);
+            appPreferences.unregisterProxyCredentialsListener(proxyCredentialsChangeListener);
+        }
         super.onDestroy();
     }