diff --git a/Variables/VanDerPol.onb b/Variables/VanDerPol.onb
index b4cd1f0b398..45b4e73827c 100644
--- a/Variables/VanDerPol.onb
+++ b/Variables/VanDerPol.onb
@@ -35,7 +35,7 @@ end VanDerPol;
<html><head><meta name="qrichtext" content="1" /></head><body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;"><p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Courier New; font-size:11pt; color:#000000;"></p></body></html>
- plotParametric( { x, y } );
+ plotParametric( x, y );