diff --git a/src/gui/application/main.cpp b/src/gui/application/main.cpp
index 863c085..51230e8 100644
--- a/src/gui/application/main.cpp
+++ b/src/gui/application/main.cpp
@@ -544,7 +544,7 @@ int main(int argc, char *argv[])
 
     config->setGroup(GeneralOptionsConfigGroup);
     int install = config->readNumEntry("Install Own Theme", 1);
-    if (install == 2 || (install == 1 && !getenv("KDE_FULL_SESSION"))) {
+    if (install == 2 || (install == 1 && !getenv("TDE_FULL_SESSION"))) {
 	kapp->setStyle(new KlearlookStyle);
     }