diff --git a/src/display.rs b/src/display.rs
index 7b2bf1c..e544657 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -60,6 +60,7 @@ mod placeholder {
     use super::{AsDisplay, Sealed};
     use core::fmt::{self, Display};
 
+    #[allow(dead_code)]
     pub struct Placeholder;
 
     impl<'a> AsDisplay<'a> for Placeholder {