diff --git a/gtk2/kgtk2.c b/gtk2/kgtk2.c
index 0dddab5..6377d66 100644
--- a/gtk2/kgtk2.c
+++ b/gtk2/kgtk2.c
@@ -477,12 +477,12 @@ static gboolean kgtkInit(const char *appName)
     if(!initialised)
     {
 #ifdef KGTK_DEBUG
-        printf("KGTK::Running under KDE? %d\n", NULL!=getenv("KDE_FULL_SESSION"));
+        printf("KGTK::Running under KDE? %d\n", NULL!=getenv("TDE_FULL_SESSION"));
 #endif
 
         initialised=TRUE;
         kgtkAppName=getAppName(appName);
-        useKde=NULL!=getenv("KDE_FULL_SESSION") && connectToKDialogD(kgtkAppName);
+        useKde=NULL!=getenv("TDE_FULL_SESSION") && connectToKDialogD(kgtkAppName);
         if(useKde)
         {
             const gchar *prg=getAppName(NULL);
diff --git a/qt3/kqt3.cpp b/qt3/kqt3.cpp
index 7407f76..962f72a 100644
--- a/qt3/kqt3.cpp
+++ b/qt3/kqt3.cpp
@@ -460,7 +460,7 @@ static bool kqtInit()
     if(!initialised)
     {
         initialised=true;
-        useKde=NULL!=getenv("KDE_FULL_SESSION") && connectToKDialogD(getAppName());
+        useKde=NULL!=getenv("TDE_FULL_SESSION") && connectToKDialogD(getAppName());
         if(useKde)
             atexit(&kqtExit);
     }