diff --git a/scripts/build_central_heating_temperature_profiles/run.py b/scripts/build_central_heating_temperature_profiles/run.py
index ab9d72ca0..49576b4b2 100644
--- a/scripts/build_central_heating_temperature_profiles/run.py
+++ b/scripts/build_central_heating_temperature_profiles/run.py
@@ -216,7 +216,7 @@ def scale_temperature_to_investment_year(
     return_temperature_investment_year = scale_temperature_to_investment_year(
         temperature_baseyear=snakemake.params.return_temperature_central_heating_baseyear,
         relative_annual_temperature_reduction=snakemake.params.relative_annual_temperature_reduction,
-        investment_year=int(snakemake.wildcards.planning_horizons[-4:]),
+        investment_year=int(snakemake.wildcards.planning_horizons),
         current_year=int(snakemake.params.energy_totals_year),
     )