diff --git a/pkstrings/src/pkstring.rs b/pkstrings/src/pkstring.rs
index f663561..15af130 100644
--- a/pkstrings/src/pkstring.rs
+++ b/pkstrings/src/pkstring.rs
@@ -22,6 +22,7 @@
 
 use std::convert::TryFrom;
 use std::fmt;
+use std::error::Error as StdError;
 use std::ops::Deref;
 
 const fn in_range(ord: u8) -> bool {
@@ -111,6 +112,8 @@ pub enum Error {
     InvalidCharacter(char),
 }
 
+impl StdError for Error {}
+
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
         match self {