diff --git a/interp/grid/delaunay.py b/interp/grid/delaunay.py
index 716af33..74d76cc 100644
--- a/interp/grid/delaunay.py
+++ b/interp/grid/delaunay.py
@@ -32,7 +32,7 @@ def get_index_only(g):
 def get_index_only_str(g):
   return "\n".join(get_index_only(g))
 
-class grid(basegrid):
+class dgrid(basegrid):
   cell_re = re.compile(r'''
                             -\s+(?P<cell>f\d+).*?
                             vertices:\s(?P<verts>.*?)\n.*?
@@ -61,7 +61,7 @@ class grid(basegrid):
       of.write(qdelaunay_string)
 
     cell_to_cells = []
-    for matcher in grid.cell_re.finditer(qdelaunay_string):
+    for matcher in dgrid.cell_re.finditer(qdelaunay_string):
       d = matcher.groupdict()
 
       cell_name          = d['cell']
@@ -71,7 +71,7 @@ class grid(basegrid):
       cur_cell = cell(cell_name)
       self.cells[cell_name] = cur_cell
 
-      for v in grid.vert_re.findall(verticies):
+      for v in dgrid.vert_re.findall(verticies):
         vertex_index = int(v[1:])
         cur_cell.add_vert(vertex_index)
         self.cells_for_vert[vertex_index].append(cur_cell)