diff --git a/src/tools/qdbusxml2cpp/qdbusxml2cpp.cpp b/src/tools/qdbusxml2cpp/qdbusxml2cpp.cpp
index 3d3df4128d0..b4c23da6285 100644
--- a/src/tools/qdbusxml2cpp/qdbusxml2cpp.cpp
+++ b/src/tools/qdbusxml2cpp/qdbusxml2cpp.cpp
@@ -32,7 +32,6 @@
 ****************************************************************************/
 
 #include <qbytearray.h>
-#include <qdatetime.h>
 #include <qdebug.h>
 #include <qfile.h>
 #include <qfileinfo.h>
@@ -58,7 +57,6 @@ static QString parentClassName;
 static QString proxyFile;
 static QString adaptorFile;
 static QString inputFile;
-static QDateTime classCreationTime;
 static bool skipNamespaces;
 static bool verbose;
 static bool includeMocs;
@@ -212,10 +210,8 @@ static QDBusIntrospection::Interfaces readInput()
     QFile input(inputFile);
     if (inputFile.isEmpty() || inputFile == QLatin1String("-")) {
         input.open(stdin, QIODevice::ReadOnly);
-        classCreationTime = QDateTime::currentDateTime();
     } else {
         input.open(QIODevice::ReadOnly);
-        classCreationTime = QFileInfo(input).lastModified();
     }
 
     QByteArray data = input.readAll();
@@ -560,9 +556,8 @@ static void writeProxy(const QString &filename, const QDBusIntrospection::Interf
     } else {
         includeGuard = QLatin1String("QDBUSXML2CPP_PROXY");
     }
-    includeGuard = QString(QLatin1String("%1_%2"))
-                   .arg(includeGuard)
-                   .arg(classCreationTime.toTime_t());
+    includeGuard = QString(QLatin1String("%1"))
+                   .arg(includeGuard);
     hs << "#ifndef " << includeGuard << endl
        << "#define " << includeGuard << endl
        << endl;
@@ -868,9 +863,8 @@ static void writeAdaptor(const QString &filename, const QDBusIntrospection::Inte
     } else {
         includeGuard = QLatin1String("QDBUSXML2CPP_ADAPTOR");
     }
-    includeGuard = QString(QLatin1String("%1_%2"))
-                   .arg(includeGuard)
-                   .arg(QDateTime::currentDateTime().toTime_t());
+    includeGuard = QString(QLatin1String("%1"))
+                   .arg(includeGuard);
     hs << "#ifndef " << includeGuard << endl
        << "#define " << includeGuard << endl
        << endl;