diff --git a/redisson/src/main/java/org/redisson/client/handler/CommandDecoder.java b/redisson/src/main/java/org/redisson/client/handler/CommandDecoder.java
index b7097e77e..aa227cc66 100644
--- a/redisson/src/main/java/org/redisson/client/handler/CommandDecoder.java
+++ b/redisson/src/main/java/org/redisson/client/handler/CommandDecoder.java
@@ -300,7 +300,8 @@ public class CommandDecoder extends ReplayingDecoder<State> {
             
             decodeList(in, data, parts, channel, size, respParts);
         } else {
-            throw new IllegalStateException("Can't decode replay " + (char)code);
+            String dataStr = in.toString(0, in.writerIndex(), CharsetUtil.UTF_8);
+            throw new IllegalStateException("Can't decode replay: " + dataStr);
         }
     }