diff --git a/scripts/build_industry_sector_ratios_intermediate.py b/scripts/build_industry_sector_ratios_intermediate.py
index 5fe042ab..ebbabdb2 100644
--- a/scripts/build_industry_sector_ratios_intermediate.py
+++ b/scripts/build_industry_sector_ratios_intermediate.py
@@ -129,11 +129,12 @@ def build_industry_sector_ratios_intermediate():
         ]
         today_sector_ratios_ct.loc[:, ~missing_mask] = today_sector_ratios_ct.loc[
             :, ~missing_mask
-        ].fillna(0)
+        ].fillna(future_sector_ratios)
         intermediate_sector_ratios[ct] = (
             today_sector_ratios_ct * (1 - fraction_future)
             + future_sector_ratios * fraction_future
         )
+
     intermediate_sector_ratios = pd.concat(intermediate_sector_ratios, axis=1)
 
     intermediate_sector_ratios.to_csv(snakemake.output.industry_sector_ratios)