diff --git a/src/responders.rs b/src/responders.rs
index 1a38ab2..c6e273f 100644
--- a/src/responders.rs
+++ b/src/responders.rs
@@ -345,6 +345,7 @@ impl From<SwapOption> for HeaderValue {
     }
 }
 
+#[derive(Debug)]
 pub enum HxError {
     InvalidHeaderValue(InvalidHeaderValue),