diff --git a/src/types.rs b/src/types.rs
index 1e069e8..b826515 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -41,6 +41,12 @@ impl Display for QrError {
     }
 }
 
+impl ::std::error::Error for QrError {
+    fn description(&self) -> &'static str {
+        "QrError"
+    }
+}
+
 /// `QrResult` is a convenient alias for a QR code generation result.
 pub type QrResult<T> = Result<T, QrError>;