diff --git a/src/models/StratumV1ClientStatistics.ts b/src/models/StratumV1ClientStatistics.ts
index 45d3391..538f224 100644
--- a/src/models/StratumV1ClientStatistics.ts
+++ b/src/models/StratumV1ClientStatistics.ts
@@ -51,7 +51,7 @@ export class StratumV1ClientStatistics {
         // miner hasn't submitted shares in one minute
         if (this.submissionCache.length == 0) {
             if ((new Date().getTime() - this.submissionCacheStart.getTime()) / 1000 > 60) {
-                return this.nearestPowerOfTwo(clientDifficulty >> 1);
+                return this.nearestPowerOfTwo(clientDifficulty / 6);
             } else {
                 return null;
             }