diff --git a/pkstrings/src/lib.rs b/pkstrings/src/lib.rs
index 58557cd..06b023c 100644
--- a/pkstrings/src/lib.rs
+++ b/pkstrings/src/lib.rs
@@ -91,6 +91,14 @@ pub enum Error {
     InvalidCharacter,
 }
 
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        match self {
+            Error::InvalidCharacter => write!(f, "Invalid character"),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct PKString(String);