diff --git a/src/ascii_string.rs b/src/ascii_string.rs
index 564e3f2..86624da 100644
--- a/src/ascii_string.rs
+++ b/src/ascii_string.rs
@@ -672,6 +672,7 @@ impl<O> fmt::Display for FromAsciiError<O> {
 }
 impl<O: Any> Error for FromAsciiError<O> {
     #[inline]
+    #[allow(deprecated)]
     fn description(&self) -> &str {
         self.error.description()
     }