diff --git a/qt3-tqt3/convert_qt_itself_qt3_batch4 b/qt3-tqt3/convert_qt_itself_qt3_batch4
index 2feb41b..638fd3c 100755
--- a/qt3-tqt3/convert_qt_itself_qt3_batch4
+++ b/qt3-tqt3/convert_qt_itself_qt3_batch4
@@ -8,5 +8,6 @@ find ./ -type f -iname "*" -not -iwholename '*.git*' -exec sed -i 's/Q_CLASSINFO
 
 find ./ -type f -iname "*" -not -iwholename '*.git*' -exec sed -i 's/QT_POINTER_SIZE/TQT_POINTER_SIZE/g' {} \;
 find ./ -type f -iname "*" -not -iwholename '*.git*' -exec sed -i 's/\([^T]\)Qt3/\1TQt3/g' {} \;
+find ./ -type f -iname "*" -not -iwholename '*.git*' -exec sed -i 's/qt_main_thread/tqt_main_thread/g' {} \;
 
 exit 0