diff --git a/src/stratum_server.cpp b/src/stratum_server.cpp
index 73ccbea..880d888 100644
--- a/src/stratum_server.cpp
+++ b/src/stratum_server.cpp
@@ -530,7 +530,6 @@ void StratumServer::reset_share_counters()
 	WriteLock lock(m_hashrateDataLock);
 
 	m_cumulativeHashesAtLastShare = m_cumulativeHashes;
-	m_cumulativeFoundSharesDiff = 0.0;
 	m_totalFoundShares = 0;
 	m_totalFailedShares = 0;
 }