1 files changed, 1 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs
index fcf43eb..69993ed 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -16,6 +16,7 @@ pub enum Error {
     MismatchedEndTag(Name, Name),
     NotInElement(String),
     ExtraData(String),
+    UndeclaredNamespace(String),
 }
 
 impl From<std::io::Error> for Error {