diff --git a/backend/src/api/audit.ts b/backend/src/api/audit.ts
index e78b2796f..0ddfc2cc2 100644
--- a/backend/src/api/audit.ts
+++ b/backend/src/api/audit.ts
@@ -9,7 +9,7 @@ class Audit {
   auditBlock(transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended }, useAccelerations: boolean = false)
    : { censored: string[], added: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
     if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
-      return { censored: [], added: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 0, similarity: 1 };
+      return { censored: [], added: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 1, similarity: 1 };
     }
 
     const matches: string[] = []; // present in both mined block and template
@@ -144,7 +144,12 @@ class Audit {
 
     const numCensored = Object.keys(isCensored).length;
     const numMatches = matches.length - 1; // adjust for coinbase tx
-    const score = numMatches > 0 ? (numMatches / (numMatches + numCensored)) : 0;
+    let score = 0;
+    if (numMatches <= 0 && numCensored <= 0) {
+      score = 1;
+    } else if (numMatches > 0) {
+      score = (numMatches / (numMatches + numCensored));
+    }
     const similarity = projectedWeight ? matchedWeight / projectedWeight : 1;
 
     return {