diff --git a/masque/file/dxf.py b/masque/file/dxf.py
index da35531..d7bc7e8 100644
--- a/masque/file/dxf.py
+++ b/masque/file/dxf.py
@@ -304,13 +304,13 @@ def _mrefs_to_drefs(
             b = rep.b_vector if rep.b_vector is not None else numpy.zeros(2)
             rotated_a = rotation_matrix_2d(-ref.rotation) @ a
             rotated_b = rotation_matrix_2d(-ref.rotation) @ b
-            if rotated_a[1] == 0 and rotated_b[0] == 0:
+            if numpy.isclose(rotated_a[1], 0) and numpy.isclose(rotated_b[0], 0):
                 attribs['column_count'] = rep.a_count
                 attribs['row_count'] = rep.b_count
                 attribs['column_spacing'] = rotated_a[0]
                 attribs['row_spacing'] = rotated_b[1]
                 block.add_blockref(encoded_name, ref.offset, dxfattribs=attribs)
-            elif rotated_a[0] == 0 and rotated_b[1] == 0:
+            elif numpy.isclose(rotated_a[0], 0) and numpy.isclose(rotated_b[1], 0):
                 attribs['column_count'] = rep.b_count
                 attribs['row_count'] = rep.a_count
                 attribs['column_spacing'] = rotated_b[0]