1 files changed, 1 insertions, 0 deletions
diff --git a/src/plugins/graphicssystems/trace/qgraphicssystem_trace.cpp b/src/plugins/graphicssystems/trace/qgraphicssystem_trace.cpp
index 8756ecb..fb6f5ea 100644
--- a/src/plugins/graphicssystems/trace/qgraphicssystem_trace.cpp
+++ b/src/plugins/graphicssystems/trace/qgraphicssystem_trace.cpp
@@ -82,6 +82,7 @@ QTraceWindowSurface::~QTraceWindowSurface()
         QFile outputFile(QString(QLatin1String("qtgraphics-%0.trace")).arg(winId));
         if (outputFile.open(QIODevice::WriteOnly)) {
             QDataStream out(&outputFile);
+            out.writeBytes("qttrace", 7);
             out << *buffer << updates;
         }
         delete buffer;