diff --git a/app/src/main/java/com/stevesoltys/seedvault/settings/SchedulingFragment.kt b/app/src/main/java/com/stevesoltys/seedvault/settings/SchedulingFragment.kt
index ea901b4b..bc0fb203 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/settings/SchedulingFragment.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/settings/SchedulingFragment.kt
@@ -45,7 +45,7 @@ class SchedulingFragment : PreferenceFragmentCompat(),
         }
     }
 
-    override fun onDisplayPreferenceDialog(preference: Preference?) {
+    override fun onDisplayPreferenceDialog(preference: Preference) {
         when (preference) {
             is ListPreference -> {
                 val dialogFragment = M3ListPreference.newInstance(preference.getKey())