diff --git a/src/kanapy/input_output.py b/src/kanapy/input_output.py
index b4190b48..ed0c5b20 100644
--- a/src/kanapy/input_output.py
+++ b/src/kanapy/input_output.py
@@ -149,7 +149,7 @@ def write_grain_sets():
         # Create element sets for grains
         for k, v in grain_dict.items():
             f.write('*ELSET, ELSET=GRAIN{0}_SET\n'.format(k))
-            for enum, el in enumerate(v[:-2], start=1):
+            for enum, el in enumerate(v[:-1], start=1):
                 if enum % 16 != 0:
                     f.write('%d, ' % el)
                 else: