diff --git a/src/probabilistic/HyperLogLog.cc b/src/probabilistic/HyperLogLog.cc
index be7db65046..888d8273df 100644
--- a/src/probabilistic/HyperLogLog.cc
+++ b/src/probabilistic/HyperLogLog.cc
@@ -113,7 +113,7 @@ double CardinalityCounter::Size()
 	answer = (alpha_m * m * m * answer);
 
 	if ( answer <= 5.0 * (m/2) )
-		return m * log((double)(m / V));
+		return m * log(((double) m) / V);
 
 	else if ( answer <= (pow(2, 64) / 30) )
 		return answer;