diff --git a/Stream_support/include/CGAL/IO/polygon_soup_io.h b/Stream_support/include/CGAL/IO/polygon_soup_io.h
index 098d088680b..74229da797e 100644
--- a/Stream_support/include/CGAL/IO/polygon_soup_io.h
+++ b/Stream_support/include/CGAL/IO/polygon_soup_io.h
@@ -100,7 +100,7 @@ bool read_polygon_soup(const std::string& fname,
   else if(ext == "ts")
     return read_GOCAD(fname, points, polygons, np);
 #ifdef CGAL_USE_VTK
-  else if(ext == "ts")
+  else if(ext == "vtp")
     return read_VTP(fname, points, polygons, np);
 #endif