diff --git a/scripts/prepare_sector_network.py b/scripts/prepare_sector_network.py
index 87aa90fa..0e966538 100644
--- a/scripts/prepare_sector_network.py
+++ b/scripts/prepare_sector_network.py
@@ -2595,13 +2595,15 @@ def add_biomass(n, costs):
         if options["municipal_solid_waste"]:
             n.madd(
                 "Link",
-                biomass_transport.index,
-                bus0=biomass_transport.bus0 + " municipal solid waste",
-                bus1=biomass_transport.bus1 + " municipal solid waste",
+                biomass_transport.index + " municipal solid waste",
+                bus0=biomass_transport.bus0.values + " municipal solid waste",
+                bus1=biomass_transport.bus1.values + " municipal solid waste",
                 p_nom_extendable=False,
                 p_nom=5e4,
                 length=biomass_transport.length.values,
-                marginal_cost=biomass_transport.costs * biomass_transport.length.values,
+                marginal_cost=(
+                    biomass_transport.costs * biomass_transport.length
+                ).values,
                 carrier="municipal solid waste transport",
             )