diff --git a/k9mail/src/main/java/com/fsck/k9/preferences/GlobalSettings.java b/k9mail/src/main/java/com/fsck/k9/preferences/GlobalSettings.java
index be3de86d9..6ac2ac684 100644
--- a/k9mail/src/main/java/com/fsck/k9/preferences/GlobalSettings.java
+++ b/k9mail/src/main/java/com/fsck/k9/preferences/GlobalSettings.java
@@ -266,6 +266,9 @@ public class GlobalSettings {
                 new V(38, new EnumSetting<NotificationQuickDelete>(NotificationQuickDelete.class,
                         NotificationQuickDelete.NEVER))
             ));
+        s.put("notificationDuringQuietTimeEnabled", Settings.versions(
+                new V(39, new BooleanSetting(true))
+        ));
 
         SETTINGS = Collections.unmodifiableMap(s);
 
diff --git a/k9mail/src/main/java/com/fsck/k9/preferences/Settings.java b/k9mail/src/main/java/com/fsck/k9/preferences/Settings.java
index 9c466dcf0..b9c55a7f3 100644
--- a/k9mail/src/main/java/com/fsck/k9/preferences/Settings.java
+++ b/k9mail/src/main/java/com/fsck/k9/preferences/Settings.java
@@ -35,7 +35,7 @@ public class Settings {
      *
      * @see SettingsExporter
      */
-    public static final int VERSION = 38;
+    public static final int VERSION = 39;
 
     public static Map<String, Object> validate(int version, Map<String,
             TreeMap<Integer, SettingsDescription>> settings,