diff --git a/kipi-plugins/configure.in.in b/kipi-plugins/configure.in.in
index 8ad679a..3103327 100644
--- a/kipi-plugins/configure.in.in
+++ b/kipi-plugins/configure.in.in
@@ -388,10 +388,10 @@ if test "x$build_opengl" != "xno"; then
     LIBS="$LIBS $LIBQT $KDE_MT_LIBS"
 
     AC_TRY_LINK([
-    #include <qgl.h>
+    #include <tqgl.h>
     ],
     [
-    (void)new QGLWidget((QWidget*)0, "qgl");
+    (void)new TQGLWidget((TQWidget*)0, "qgl");
     ],
     ac_cv_kde_qt_has_opengl=yes,
     ac_cv_kde_qt_has_opengl=no)