diff --git a/codec/src/main/java/io/netty/handler/codec/protobuf/ProtobufDecoder.java b/codec/src/main/java/io/netty/handler/codec/protobuf/ProtobufDecoder.java
index ee91191bb4..a31e16461e 100644
--- a/codec/src/main/java/io/netty/handler/codec/protobuf/ProtobufDecoder.java
+++ b/codec/src/main/java/io/netty/handler/codec/protobuf/ProtobufDecoder.java
@@ -16,6 +16,7 @@
 package io.netty.handler.codec.protobuf;
 
 import com.google.protobuf.ExtensionRegistry;
+import com.google.protobuf.ExtensionRegistryLite;
 import com.google.protobuf.Message;
 import com.google.protobuf.MessageLite;
 import io.netty.buffer.ByteBuf;
@@ -78,7 +79,7 @@ public class ProtobufDecoder extends MessageToMessageDecoder<ByteBuf> {
     }
 
     private final MessageLite prototype;
-    private final ExtensionRegistry extensionRegistry;
+    private final ExtensionRegistryLite extensionRegistry;
 
     /**
      * Creates a new instance.
@@ -88,6 +89,10 @@ public class ProtobufDecoder extends MessageToMessageDecoder<ByteBuf> {
     }
 
     public ProtobufDecoder(MessageLite prototype, ExtensionRegistry extensionRegistry) {
+        this(prototype, (ExtensionRegistryLite) extensionRegistry);
+    }
+
+    public ProtobufDecoder(MessageLite prototype, ExtensionRegistryLite extensionRegistry) {
         if (prototype == null) {
             throw new NullPointerException("prototype");
         }