diff --git a/lightning/src/routing/scoring.rs b/lightning/src/routing/scoring.rs
index 0f25f108c0c..177dc02442d 100644
--- a/lightning/src/routing/scoring.rs
+++ b/lightning/src/routing/scoring.rs
@@ -1960,7 +1960,13 @@ mod bucketed_history {
 				if payment_pos < max_bucket_end_pos {
 					let (numerator, denominator) = success_probability(payment_pos as u64, 0,
 						max_bucket_end_pos as u64, POSITION_TICKS as u64 - 1, params, true);
+					let bucket_prob_times_four =
+						total_weight * 4 / total_valid_points_tracked;
+					let bucket_prob_times_billion = bucket_prob_times_four * 1024 * 1024 * 1024 / 4;
+					let val = (bucket_prob_times_billion as u64) *
+						numerator / denominator;
 					let bucket_prob = (total_weight as u128) * 1024 * 1024 * 1024 / total_valid_points_tracked as u128;
+					//assert_eq!(bucket_prob as u64, bucket_prob_times_billion as u64, "{}, {}", total_weight, total_valid_points_tracked);
 					cumulative_success_prob_times_billion += bucket_prob as u64 * numerator / denominator;
 				}
 			}