diff --git a/src/cairo/process_polygon_pattern_symbolizer.cpp b/src/cairo/process_polygon_pattern_symbolizer.cpp
index aa7b0ca12..c2b211fd8 100644
--- a/src/cairo/process_polygon_pattern_symbolizer.cpp
+++ b/src/cairo/process_polygon_pattern_symbolizer.cpp
@@ -124,8 +124,7 @@ void cairo_renderer<T>::process(polygon_pattern_symbolizer const& sym,
     agg::trans_affine tr;
     auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
     if (geom_transform) { evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_); }
-    using vertex_converter_type = vertex_converter<
-                                                   clip_poly_tag,
+    using vertex_converter_type = vertex_converter<clip_poly_tag,
                                                    transform_tag,
                                                    affine_transform_tag,
                                                    simplify_tag,
diff --git a/src/grid/process_polygon_pattern_symbolizer.cpp b/src/grid/process_polygon_pattern_symbolizer.cpp
index 5e30314e3..03e27c65d 100644
--- a/src/grid/process_polygon_pattern_symbolizer.cpp
+++ b/src/grid/process_polygon_pattern_symbolizer.cpp
@@ -78,7 +78,12 @@ void grid_renderer<T>::process(polygon_pattern_symbolizer const& sym,
         evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
     }
 
-    using vertex_converter_type = vertex_converter<clip_poly_tag,transform_tag,affine_transform_tag,smooth_tag>;
+    using vertex_converter_type = vertex_converter<clip_poly_tag,
+                                                   transform_tag,
+                                                   affine_transform_tag,
+                                                   simplify_tag,
+                                                   smooth_tag>;
+
     vertex_converter_type converter(common_.query_extent_,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
 
     if (prj_trans.equal() && clip) converter.set<clip_poly_tag>();