diff --git a/crates/sage/src/fdr.rs b/crates/sage/src/fdr.rs
index ee5eeb8..75658a3 100644
--- a/crates/sage/src/fdr.rs
+++ b/crates/sage/src/fdr.rs
@@ -232,10 +232,10 @@ pub fn picked_precursor(
 
     let scores = scores
         .into_par_iter()
-        .map(|score| (score.ix, score.q))
+        .map(|score| ((score.ix, score.decoy), score.q))
         .collect::<FnvHashMap<_, _>>();
 
-    peaks.par_iter_mut().for_each(|((ix, _), (peak, _))| {
+    peaks.par_iter_mut().for_each(|((ix), (peak, _))| {
         peak.q_value = scores[ix];
     });
     passing