diff --git a/src/misc/func.rs b/src/misc/func.rs
index 8c0c5f1..c7b73f0 100644
--- a/src/misc/func.rs
+++ b/src/misc/func.rs
@@ -297,7 +297,7 @@ pub fn ln_pflips<R: Rng>(
     let z = if normed {
         0.0
     } else {
-        ln_weights.iter().copied().logsumexp()
+        ln_weights.iter().logsumexp()
     };
 
     // doing this instead of calling pflips shaves about 30% off the runtime.