diff --git a/src/network/access/qhttp2protocolhandler.cpp b/src/network/access/qhttp2protocolhandler.cpp
index ac90714132..c8b051731a 100644
--- a/src/network/access/qhttp2protocolhandler.cpp
+++ b/src/network/access/qhttp2protocolhandler.cpp
@@ -1209,6 +1209,9 @@ void QHttp2ProtocolHandler::updateStream(Stream &stream, const Frame &frame,
             QByteDataBuffer inDataBuffer;
             inDataBuffer.append(wrapped);
             replyPrivate->uncompressBodyData(&inDataBuffer, &replyPrivate->responseData);
+            // Now, make sure replyPrivate's destructor will properly clean up
+            // buffers allocated (if any) by zlib.
+            replyPrivate->autoDecompress = true;
         } else {
             replyPrivate->responseData.append(wrapped);
         }