diff --git a/src/impls/string.rs b/src/impls/string.rs
index 2b370a2..7e103a7 100644
--- a/src/impls/string.rs
+++ b/src/impls/string.rs
@@ -22,6 +22,7 @@ pub fn impl_string(info: &Info) -> proc_macro2::TokenStream {
         }
 
         impl #name {
+            #[allow(missing_docs)]
             pub fn as_str(&self) -> &str {
                 &self.0
             }