diff --git a/scripts/build_renewable_profiles.py b/scripts/build_renewable_profiles.py
index a24045a8..a075450d 100644
--- a/scripts/build_renewable_profiles.py
+++ b/scripts/build_renewable_profiles.py
@@ -413,7 +413,7 @@ if __name__ == "__main__":
     # select only buses with some capacity and minimal capacity factor
     mean_profile = ds["profile"].mean("time")
     if "year" in ds.indexes:
-        mean_profile.max("year")
+        mean_profile = mean_profile.max("year")
 
     ds = ds.sel(
         bus=(