diff --git a/src/ifml2/players/guiplayer/PlayerPreferences.java b/src/ifml2/players/guiplayer/PlayerPreferences.java
index 341f2ff5..700149a5 100644
--- a/src/ifml2/players/guiplayer/PlayerPreferences.java
+++ b/src/ifml2/players/guiplayer/PlayerPreferences.java
@@ -3,8 +3,8 @@
 import java.util.prefs.Preferences;
 
 class PlayerPreferences {
-    private static final String PLAYER_PREFS_ROOT = "/IFML2/Player";
-    private static final String THEME_KEY = "ThemeName";
+    private static final String PLAYER_PREFS_ROOT = "/ifml2/player";
+    private static final String THEME_KEY = "themename";
     private static Preferences _preferences = Preferences.userRoot().node(PLAYER_PREFS_ROOT);
 
     static String getPlayerThemeName() {