diff --git a/gprMax/geometry_outputs.py b/gprMax/geometry_outputs.py
index 1425e461..47139d37 100644
--- a/gprMax/geometry_outputs.py
+++ b/gprMax/geometry_outputs.py
@@ -19,7 +19,7 @@
 
 # TODO
 # Get progress bar working
-# 
+# subgrids geometry export
 
 
 import json