diff --git a/redisson/src/main/java/org/redisson/command/RedisExecutor.java b/redisson/src/main/java/org/redisson/command/RedisExecutor.java
index 866cd05ed..53e2cef5b 100644
--- a/redisson/src/main/java/org/redisson/command/RedisExecutor.java
+++ b/redisson/src/main/java/org/redisson/command/RedisExecutor.java
@@ -717,7 +717,7 @@ public class RedisExecutor<V, R> {
 
     private static final Map<ClassLoader, Map<Codec, Codec>> CODECS = new LRUCacheMap<>(25, 0, 0);
 
-    protected Codec getCodec(Codec codec) {
+    protected final Codec getCodec(Codec codec) {
         if (codec == null) {
             return null;
         }