diff --git a/src/maxicode/detector.rs b/src/maxicode/detector.rs
index 105281b..33c7147 100644
--- a/src/maxicode/detector.rs
+++ b/src/maxicode/detector.rs
@@ -36,7 +36,7 @@ struct Circle<'a> {
     image: &'a BitMatrix,
 }
 
-impl<'a> Circle<'_> {
+impl Circle<'_> {
     pub fn calculate_circle_variance(&self) -> f32 {
         let total_width_even = self
             .horizontal_buckets