diff --git a/src/lib.rs b/src/lib.rs
index 34dd56bb..4b0ccd8d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -282,7 +282,7 @@ impl Default for Options {
         }
         // We always need NoOp to be present
         let mut alphas = HashSet::new();
-        self.alphas.insert(AlphaOptim::NoOp);
+        alphas.insert(AlphaOptim::NoOp);
 
         Options {
             backup: false,