diff --git a/bin/live/pycbc_live_combine_single_significance_fits b/bin/live/pycbc_live_combine_single_significance_fits
index 373b06d0f2a..8099475787c 100644
--- a/bin/live/pycbc_live_combine_single_significance_fits
+++ b/bin/live/pycbc_live_combine_single_significance_fits
@@ -195,7 +195,7 @@ for ifo in args.ifos:
         mean_alpha = c[valid].mean() / invalphan.mean()
         cons_count = np.percentile(
             c[valid],
-            100 - args.conservative_percentile
+            args.conservative_percentile
         )
         cons_invalphan = np.percentile(
             invalphan,