diff --git a/df_py/volume/queries.py b/df_py/volume/queries.py
index 953e3b311..1355dc738 100644
--- a/df_py/volume/queries.py
+++ b/df_py/volume/queries.py
@@ -524,15 +524,14 @@ def _queryVolsOwners(
 
             # add gas cost value
             if gasCost > 0:
+                if order["tx"] in txgascost:
+                    continue
                 if native_token_addr not in gasvols:
                     gasvols[native_token_addr] = {}
-
                 if nft_addr not in gasvols[native_token_addr]:
                     gasvols[native_token_addr][nft_addr] = 0
-
-                if order["tx"] not in txgascost:
-                    txgascost[order["tx"]] = gasCost
-                    gasvols[native_token_addr][nft_addr] += gasCost
+                txgascost[order["tx"]] = gasCost
+                gasvols[native_token_addr][nft_addr] += gasCost
 
             if lastPriceValue == 0:
                 continue