diff --git a/backend/src/api/mempool.ts b/backend/src/api/mempool.ts
index 73260dc9e..f5e788f98 100644
--- a/backend/src/api/mempool.ts
+++ b/backend/src/api/mempool.ts
@@ -94,7 +94,7 @@ class Mempool {
       logger.debug(`Migrating ${Object.keys(this.mempoolCache).length} transactions from disk cache to Redis cache`);
     }
     for (const txid of Object.keys(this.mempoolCache)) {
-      if (!this.mempoolCache[txid].sigops || this.mempoolCache[txid].effectiveFeePerVsize == null) {
+      if (!this.mempoolCache[txid].adjustedVsize || this.mempoolCache[txid].sigops == null || this.mempoolCache[txid].effectiveFeePerVsize == null) {
         this.mempoolCache[txid] = transactionUtils.extendMempoolTransaction(this.mempoolCache[txid]);
       }
       if (this.mempoolCache[txid].order == null) {