diff --git a/scripts/xyz_grid.py b/scripts/xyz_grid.py
index be69999e0..83b8db79d 100644
--- a/scripts/xyz_grid.py
+++ b/scripts/xyz_grid.py
@@ -393,7 +393,7 @@ class XYZGridScript(scripts_manager.Script):
             return processed # something broke, no further handling needed.
 
         have_grid = 1 if include_grid else 0
-        have_subgrids = len(zs) if len(zs) > 1 and include_subgrids else 0
+        have_subgrids = len(zs) if len(zs) > 1 and (include_grid or include_subgrids) else 0 # sub-grids are created whenever the main grid is, see draw_xyz_grid
         have_images = processed.images[have_grid+have_subgrids:]
         processed.infotexts[:have_grid+have_subgrids] = grid_infotext[:have_grid+have_subgrids] # update infotexts with grid and subgrid info
         log.debug(f'XYZ grid: grid={have_grid} subgrids={have_subgrids} images={len(have_images)} total={len(processed.images)}')
diff --git a/scripts/xyz_grid_on.py b/scripts/xyz_grid_on.py
index df17c4fb0..26eaeee64 100644
--- a/scripts/xyz_grid_on.py
+++ b/scripts/xyz_grid_on.py
@@ -422,7 +422,7 @@ class XYZGridScript(scripts_manager.Script):
             return processed # something broke, no further handling needed.
 
         have_grid = 1 if include_grid else 0
-        have_subgrids = len(zs) if len(zs) > 1 and include_subgrids else 0
+        have_subgrids = len(zs) if len(zs) > 1 and (include_grid or include_subgrids) else 0 # sub-grids are created whenever the main grid is, see draw_xyz_grid
         have_images = processed.images[have_grid+have_subgrids:]
         processed.infotexts[:have_grid+have_subgrids] = grid_infotext[:have_grid+have_subgrids] # update infotexts with grid and subgrid info
         log.debug(f'XYZ grid: grid={have_grid} subgrids={have_subgrids} images={len(have_images)} total={len(processed.images)}')