diff --git a/codec-http/src/main/java/io/netty/handler/codec/http/multipart/HttpPostRequestDecoder.java b/codec-http/src/main/java/io/netty/handler/codec/http/multipart/HttpPostRequestDecoder.java
index af53bacf7f..5c6b1e4f00 100644
--- a/codec-http/src/main/java/io/netty/handler/codec/http/multipart/HttpPostRequestDecoder.java
+++ b/codec-http/src/main/java/io/netty/handler/codec/http/multipart/HttpPostRequestDecoder.java
@@ -1204,6 +1204,7 @@ public class HttpPostRequestDecoder {
      */
     public void destroy() {
         checkDestroyed();
+        destroyed = true;
 
         cleanFiles();
         if (undecodedChunk != null && undecodedChunk.refCnt() > 0) {