diff --git a/codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java b/codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java
index 48453c4ec6..91d3e7c5fd 100644
--- a/codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java
+++ b/codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java
@@ -152,7 +152,10 @@ public abstract class AbstractMemoryHttpData extends AbstractHttpData {
 
     @Override
     public void delete() {
-        // nothing to do
+        if (byteBuf != null) {
+            byteBuf.release();
+            byteBuf = null;
+        }
     }
 
     @Override