diff --git a/src/_backend_agg.cpp b/src/_backend_agg.cpp
index 824f51dcdbe8..73fbe627d069 100644
--- a/src/_backend_agg.cpp
+++ b/src/_backend_agg.cpp
@@ -660,7 +660,7 @@ RendererAgg::draw_markers(const Py::Tuple& args)
     // Deal with the difference in y-axis direction
     marker_trans *= agg::trans_affine_scaling(1.0, -1.0);
     trans *= agg::trans_affine_scaling(1.0, -1.0);
-    trans *= agg::trans_affine_translation(0.0, (double)height);
+    trans *= agg::trans_affine_translation(0.5, (double)height+0.5);
 
     PathIterator       marker_path(marker_path_obj);
     transformed_path_t marker_path_transformed(marker_path, marker_trans);
diff --git a/src/path_converters.h b/src/path_converters.h
index c45ff862c6f6..e1263c117e5e 100644
--- a/src/path_converters.h
+++ b/src/path_converters.h
@@ -494,8 +494,8 @@ class PathSnapper
         code = m_source->vertex(x, y);
         if (m_snap && agg::is_vertex(code))
         {
-            *x = mpl_round(*x) + m_snap_value;
-            *y = mpl_round(*y) + m_snap_value;
+             *x = mpl_round(*x-m_snap_value) + m_snap_value;
+             *y = mpl_round(*y-m_snap_value) + m_snap_value;
         }
         return code;
     }