diff --git a/message_ix_models/tools/bilateralize/historical_calibration.py b/message_ix_models/tools/bilateralize/historical_calibration.py
index 942ff30287..7c340a3390 100644
--- a/message_ix_models/tools/bilateralize/historical_calibration.py
+++ b/message_ix_models/tools/bilateralize/historical_calibration.py
@@ -848,6 +848,13 @@ def build_historical_price(
     )
     bacidf["YEAR"] = "broadcast"
 
+    # Add costs for piped gas based on LNG prices
+    bacidf_pg = bacidf[bacidf['MESSAGE COMMODITY'] == 'LNG_shipped'].copy()
+    bacidf_pg['MESSAGE COMMODITY'] = 'gas_piped'
+    print(bacidf_pg)
+    
+    bacidf = pd.concat([bacidf, bacidf_pg])
+    
     outdf = reformat_to_parameter(
         indf=bacidf,
         message_regions=message_regions,
@@ -860,7 +867,8 @@ def build_historical_price(
 
     outdf["value"] = outdf["value"] * 0.50  # TODO: Fix this deflator (2024-2005?)
     outdf["value"] = round(outdf["value"], 0)
-
+    print(outdf)
+    
     return outdf
 
 
@@ -932,4 +940,4 @@ def build_hist_new_capacity_flow(
     imodf = imodf[["node_loc", "technology", "year_vtg", "value", "unit"]]
     imodf = imodf[imodf["node_loc"] != ""]
 
-    return imodf
+    return imodf
\ No newline at end of file
diff --git a/message_ix_models/tools/bilateralize/prepare_edit.py b/message_ix_models/tools/bilateralize/prepare_edit.py
index 67282b738b..cb6c0b60ff 100644
--- a/message_ix_models/tools/bilateralize/prepare_edit.py
+++ b/message_ix_models/tools/bilateralize/prepare_edit.py
@@ -1342,10 +1342,10 @@ def prepare_edit_files(
         costdf["technology"] = costdf["technology"].str.replace("ethanol_", "eth_")
         costdf["technology"] = costdf["technology"].str.replace("fueloil_", "foil_")
 
-        for tec in [i for i in covered_tec if i != "gas_piped"]:
+        for tec in covered_tec: #[i for i in covered_tec if i != "gas_piped"]:
             log.info("Add fix cost for " + tec)
 
-            if "piped" in tec:
+            if "piped" in tec and tec != 'gas_piped':
                 tec_shipped = tec.replace("piped", "shipped")
                 add_df = costdf[costdf["technology"].str.contains(tec_shipped)].copy()
                 add_df["technology"] = add_df["technology"].str.replace(
@@ -1383,7 +1383,7 @@ def prepare_edit_files(
             add_df["value"] = np.where(
                 add_df["value"].isnull(), mean_cost, add_df["value"]
             )
-            add_df["value"] = round(add_df["value"] / 5, 0)
+            add_df["value"] = round(add_df["value"], 0)
 
             add_df["unit"] = "USD/GWa"
 
@@ -1401,4 +1401,4 @@ def prepare_edit_files(
             )
             add_df.to_csv(
                 os.path.join(data_path, tec, "bare_files", "fix_cost.csv"), index=False
-            )
+            )
\ No newline at end of file