diff --git a/scripts/make_summary.py b/scripts/make_summary.py
index 6aea5f92..3361805f 100644
--- a/scripts/make_summary.py
+++ b/scripts/make_summary.py
@@ -37,14 +37,14 @@ def calculate_costs(n,label,costs):
     for c in n.iterate_components(n.branch_components|n.controllable_one_port_components^{"Load"}):
         capital_costs = c.df.capital_cost*c.df[opt_name.get(c.name,"p") + "_nom_opt"]
         capital_costs_grouped = capital_costs.groupby(c.df.carrier).sum()
-
+        
         new_index = costs.index|pd.MultiIndex.from_product([[c.list_name],["capital"],capital_costs_grouped.index])
         if isinstance(new_index, pd.Index):
             new_index = pd.MultiIndex.from_tuples(new_index)
             
         costs = costs.reindex(new_index)
 
-        costs.loc[idx[c.list_name,"capital",list(capital_costs_grouped.index)],label] = capital_costs_grouped.values
+        costs.loc[idx[c.list_name, "capital", list(capital_costs_grouped.index)], label] = capital_costs_grouped.values
 
         if c.name == "Link":
             p = c.pnl.p0.multiply(n.snapshot_weightings,axis=0).sum()
@@ -90,7 +90,12 @@ def calculate_energy(n,label,energy):
     return energy
 
 def include_in_summary(summary, multiindexprefix, label, item):
-    summary = summary.reindex(summary.index | pd.MultiIndex.from_product([[p] for p in multiindexprefix] + [item.index]))
+
+    new_index = summary.index | pd.MultiIndex.from_product([[p] for p in multiindexprefix] + [item.index])
+    if isinstance(new_index, pd.Index):
+        new_index = pd.MultiIndex.from_tuples(new_index)
+    summary = summary.reindex(new_index)
+    
     summary.loc[idx[tuple(multiindexprefix + [list(item.index)])], label] = item.values
     return summary
 
@@ -133,7 +138,11 @@ def calculate_supply(n,label,supply):
 
             s = c.pnl.p[items].max().multiply(c.df.loc[items,'sign']).groupby(c.df.loc[items,'carrier']).sum()
 
-            supply = supply.reindex(supply.index|pd.MultiIndex.from_product([[i],[c.list_name],s.index]))
+            new_index = supply.index|pd.MultiIndex.from_product([[i],[c.list_name],s.index])
+            if isinstance(new_index, pd.Index):
+                new_index = pd.MultiIndex.from_tuples(new_index)
+            supply = supply.reindex(new_index)
+            
             supply.loc[idx[i,c.list_name,list(s.index)],label] = s.values
 
 
@@ -176,7 +185,11 @@ def calculate_supply_energy(n,label,supply_energy):
 
             s = c.pnl.p[items].sum().multiply(c.df.loc[items,'sign']).groupby(c.df.loc[items,'carrier']).sum()
 
-            supply_energy = supply_energy.reindex(supply_energy.index|pd.MultiIndex.from_product([[i],[c.list_name],s.index]))
+            new_index = supply_energy.index|pd.MultiIndex.from_product([[i],[c.list_name],s.index])
+            if isinstance(new_index, pd.Index):
+                new_index = pd.MultiIndex.from_tuples(new_index)
+            supply_energy = supply_energy.reindex(new_index) 
+            
             supply_energy.loc[idx[i,c.list_name,list(s.index)],label] = s.values
 
 
@@ -426,7 +439,7 @@ if __name__ == "__main__":
                      for opts in expand_from_wildcard("opts")}
 
     print(networks_dict)
-
+    
     dfs = make_summaries(networks_dict, country=snakemake.wildcards.country)
 
     to_csv(dfs)