diff --git a/src/diffpy/utils/wx/gridutils.py b/src/diffpy/utils/wx/gridutils.py
index 55cab38a..4289196d 100644
--- a/src/diffpy/utils/wx/gridutils.py
+++ b/src/diffpy/utils/wx/gridutils.py
@@ -16,6 +16,8 @@
 """Common functions for manipulating wx.grid.Grid.
 """
 
+import wx
+
 
 def getSelectionRows(grid):
     """Indices of the rows that have any cell selected.