diff --git a/scripts/prepare_network.py b/scripts/prepare_network.py
index 03187284..3eb244cf 100755
--- a/scripts/prepare_network.py
+++ b/scripts/prepare_network.py
@@ -233,10 +233,10 @@ if __name__ == "__main__":
         if "Co2L" in o:
             m = re.findall("[0-9]*\.?[0-9]+$", o)
             if len(m) > 0:
-                co2limit=float(m[0])*snakemake.config['electricity']['co2base']
-                add_co2limit(n, Nyears, co2limit)
+                co2limit = float(m[0]) * snakemake.config['electricity']['co2base']
+                add_co2limit(n, co2limit, Nyears)
             else:
-                add_co2limit(n, Nyears, snakemake.config['electricity']['co2limit'])
+                add_co2limit(n, snakemake.config['electricity']['co2limit'], Nyears)
             break
 
     for o in opts: