diff --git a/daiquiri/core/components/tomo/datatype.py b/daiquiri/core/components/tomo/datatype.py
index 4b6d13802f2fca829f26262de5f0a7df7f6b740d..8a3d982ed17e9e9b8c79f818ce6133bb5e07230f 100644
--- a/daiquiri/core/components/tomo/datatype.py
+++ b/daiquiri/core/components/tomo/datatype.py
@@ -58,7 +58,7 @@ class Sinogram:
 
     @property
     def actual_nb_points(self):
-        return self._actual_channel_points
+        return self._actual_nb_points
 
     def connect_sinogram_updated(self, callback):
         assert self._sinogram_updated is None  # nosec