diff --git a/Natives/PLPreferences.m b/Natives/PLPreferences.m
index bd30cf47..bb4f2a1b 100644
--- a/Natives/PLPreferences.m
+++ b/Natives/PLPreferences.m
@@ -52,7 +52,8 @@
                     @"execute_jar": @"8"
                 }.mutableCopy,
                 @"8": @"internal",
-                @"17": @"internal"
+                @"17": @"internal",
+                @"21": @"internal"
             }.mutableCopy,
             @"java_args": @"",
             @"env_variables": @"",