diff --git a/src/utils/wsample.jl b/src/utils/wsample.jl
index 818e4e0..f57d505 100644
--- a/src/utils/wsample.jl
+++ b/src/utils/wsample.jl
@@ -13,5 +13,5 @@ function wsample_single(a, w)
             break
         end
     end
-    return a[j]
+    return @inbounds a[j]
 end