diff --git a/src/synthesizer.rs b/src/synthesizer.rs
index 451036fda0..42c7e344b0 100644
--- a/src/synthesizer.rs
+++ b/src/synthesizer.rs
@@ -433,8 +433,8 @@ impl Synthesizer {
 
       let sample_preference = match i {
         0 => { SamplePreference::Begin },
-        _ if i == polyphone.len() => { SamplePreference::Middle },
-        _ => { SamplePreference::End },
+        _ if i == polyphone.len() - 1 => { SamplePreference::End },
+        _ => { SamplePreference::Middle },
       };
 
       let phone = self.audiobank.get_n_phone(speaker,