diff --git a/cc/algorithms/partition-selection.h b/cc/algorithms/partition-selection.h
index e0f8de15..654167ce 100644
--- a/cc/algorithms/partition-selection.h
+++ b/cc/algorithms/partition-selection.h
@@ -395,7 +395,7 @@ class LaplacePartitionSelection : public PartitionSelectionStrategy {
     ASSIGN_OR_RETURN(double adjusted_delta,
                      CalculateAdjustedDelta(delta, max_partitions_contributed));
 
-    if (delta > 0.5) {
+    if (adjusted_delta > 0.5) {
       return 1 + CalculateDiversity(epsilon, max_partitions_contributed) *
                      std::log(2 * (1 - adjusted_delta));
     } else {