diff --git a/Polyline_simplification_2/doc/Polyline_simplification_2/PackageDescription.txt b/Polyline_simplification_2/doc/Polyline_simplification_2/PackageDescription.txt
index b5c01dd7bbc..f29899a7cb8 100644
--- a/Polyline_simplification_2/doc/Polyline_simplification_2/PackageDescription.txt
+++ b/Polyline_simplification_2/doc/Polyline_simplification_2/PackageDescription.txt
@@ -25,7 +25,7 @@
 \cgalPkgDependsOn{\ref PkgTriangulation2Summary}
 \cgalPkgBib{cgal:fc-ps2}
 \cgalPkgLicense{\ref licensesGPL "GPL"}
-\cgalPkgDemo{Polygon Demo, polygon_2.zip}
+\cgalPkgDemo{Polygon Demo,polygon_2.zip}
 \cgalPkgShortInfoEnd
 \cgalPkgDescriptionEnd