diff --git a/libtdeedu/extdate/extdatetime.cpp b/libtdeedu/extdate/extdatetime.cpp
index 5d92ebd6..e5cc7b6c 100644
--- a/libtdeedu/extdate/extdatetime.cpp
+++ b/libtdeedu/extdate/extdatetime.cpp
@@ -726,7 +726,7 @@ void ExtDateTime::setTime_t( uint secsSince1Jan1970UTC, Qt::TimeSpec ts )
     time_t tmp = (time_t) secsSince1Jan1970UTC;
     tm *brokenDown = 0;
 
-#if defined(Q_OS_UNIX) && defined(TQT_THREAD_SUPPORT) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+#if defined(Q_OS_UNIX) && defined(QT_THREAD_SUPPORT) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
     // posix compliant system
     // use the reentrant versions of localtime() and gmtime() where available
     tm res;