diff --git a/scripts/xyz_grid.py b/scripts/xyz_grid.py
index 53511b121..d0ff5cb86 100644
--- a/scripts/xyz_grid.py
+++ b/scripts/xyz_grid.py
@@ -418,7 +418,7 @@ class Script(scripts.Script):
             if opt.label == 'Nothing':
                 return [0]
 
-            valslist = [x.strip() for x in chain.from_iterable(csv.reader(StringIO(vals)))]
+            valslist = [x.strip() for x in chain.from_iterable(csv.reader(StringIO(vals))) if x]
 
             if opt.type == int:
                 valslist_ext = []