diff --git a/cpp/tiledmap.cc b/cpp/tiledmap.cc
index 02a2141..32a134f 100644
--- a/cpp/tiledmap.cc
+++ b/cpp/tiledmap.cc
@@ -493,7 +493,7 @@ namespace f8
                 for (int i = 0; i < points_xobj->Size(); ++i) {
                     int x = points_xobj->At(i)->At(0)->AsXValue();
                     int y = points_xobj->At(i)->At(1)->AsXValue();
-                    int index = (y-1)*tile_columns + x;
+                    int index = y*tile_columns + x;
                     path_points.push_back(&grid_cell_list[index]);
                 }
             }