diff --git a/kdecore/kapplication.cpp b/kdecore/kapplication.cpp
index 91aa2a967..05afb3054 100644
--- a/kdecore/kapplication.cpp
+++ b/kdecore/kapplication.cpp
@@ -1311,7 +1311,7 @@ static void checkRestartVersion( TQSessionManager& sm )
     int format;
     unsigned long nitems, after;
     unsigned char* data;
-    if( XGetWindowProperty( dpy, RootWindow( dpy, 0 ), XInternAtom( dpy, "KDE_FULL_SESSION", False ),
+    if( XGetWindowProperty( dpy, RootWindow( dpy, 0 ), XInternAtom( dpy, "TDE_FULL_SESSION", False ),
         0, 1, False, AnyPropertyType, &type, &format, &nitems, &after, &data ) == Success ) {
         if( data != NULL )
             XFree( data );
diff --git a/kded/kded.cpp b/kded/kded.cpp
index 257ab3731..1d234ac06 100644
--- a/kded/kded.cpp
+++ b/kded/kded.cpp
@@ -156,7 +156,7 @@ void Kded::initModules()
 {
      m_dontLoad.clear();
      KConfig *config = kapp->config();
-     bool kde_running = !( getenv( "KDE_FULL_SESSION" ) == NULL || getenv( "KDE_FULL_SESSION" )[ 0 ] == '\0' );
+     bool kde_running = !( getenv( "TDE_FULL_SESSION" ) == NULL || getenv( "TDE_FULL_SESSION" )[ 0 ] == '\0' );
     // not the same user like the one running the session (most likely we're run via sudo or something)
     if( getenv( "KDE_SESSION_UID" ) != NULL && uid_t( atoi( getenv( "KDE_SESSION_UID" ))) != getuid())
         kde_running = false;
diff --git a/kdesu/process.cpp b/kdesu/process.cpp
index f5fb7d34e..d50e188f5 100644
--- a/kdesu/process.cpp
+++ b/kdesu/process.cpp
@@ -358,7 +358,7 @@ int PtyProcess::exec(const TQCString &command, const QCStringList &args)
     {
         putenv(const_cast<TQCString&>(*it).data());
     }
-    unsetenv("KDE_FULL_SESSION");
+    unsetenv("TDE_FULL_SESSION");
     
     // set temporarily LC_ALL to C, for su (to be able to parse "Password:")
     const char* old_lc_all = getenv( "LC_ALL" );