diff --git a/nxtomomill/settings.py b/nxtomomill/settings.py
index e1e1e7b07975570bcfa6b477ce9000af0158bc60..1b30f3f7c1d1248bbdc75344710a412cbe36f3f0 100644
--- a/nxtomomill/settings.py
+++ b/nxtomomill/settings.py
@@ -79,6 +79,7 @@ class Tomo:
             "sequence_of_scans",
             "tomo:halfturn",
             "tomo:multiturn",
+            "tomo:pcotomo",
         )
         """if a scan starts by one of those string then is considered as
         initialization scan"""