diff --git a/backend/src/__tests__/gbt/gbt-tests.ts b/backend/src/__tests__/gbt/gbt-tests.ts
index 8af76a47c..0651faac4 100644
--- a/backend/src/__tests__/gbt/gbt-tests.ts
+++ b/backend/src/__tests__/gbt/gbt-tests.ts
@@ -58,11 +58,11 @@ function mempoolFromArrayBuffer(buf: ArrayBuffer): { mempool: ThreadTransaction[
 }
 
 function txidToOrdering(txid: string): number {
-  return (
-    ((parseInt(txid.substring(62, 64), 16) << 24) |
-      (parseInt(txid.substring(60, 62), 16) << 16) |
-      (parseInt(txid.substring(58, 60), 16) << 8) |
-      parseInt(txid.substring(56, 58), 16)) >>>
-    0
+  return parseInt(
+    txid.substr(62, 2) +
+      txid.substr(60, 2) +
+      txid.substr(58, 2) +
+      txid.substr(56, 2),
+    16
   );
 }
diff --git a/backend/src/api/transaction-utils.ts b/backend/src/api/transaction-utils.ts
index 92f5b71c5..8bebc42d8 100644
--- a/backend/src/api/transaction-utils.ts
+++ b/backend/src/api/transaction-utils.ts
@@ -158,12 +158,12 @@ class TransactionUtils {
 
   // returns the most significant 4 bytes of the txid as an integer
   public txidToOrdering(txid: string): number {
-    return (
-      ((parseInt(txid.substring(62, 64), 16) << 24) |
-        (parseInt(txid.substring(60, 62), 16) << 16) |
-        (parseInt(txid.substring(58, 60), 16) << 8) |
-        parseInt(txid.substring(56, 58), 16)) >>>
-      0
+    return parseInt(
+      txid.substr(62, 2) +
+        txid.substr(60, 2) +
+        txid.substr(58, 2) +
+        txid.substr(56, 2),
+      16
     );
   }
 }