diff --git a/karabo/simulation/sky_model.py b/karabo/simulation/sky_model.py
index 23af220a..29d3d7a3 100644
--- a/karabo/simulation/sky_model.py
+++ b/karabo/simulation/sky_model.py
@@ -870,8 +870,8 @@ def get_OSKAR_sky(
 
         :return: oskar sky model
         """
-        if sky.shape[1] > SkyModel.SOURCES_COLS:
-            return oskar.Sky.from_array(sky[:, : SkyModel.SOURCES_COLS], precision)
+        if sky.shape[1] > 12:
+            return oskar.Sky.from_array(sky[:, :12], precision)
         else:
             return oskar.Sky.from_array(sky, precision)