diff --git a/src/possum/at_uri.gleam b/src/possum/at_uri.gleam
index a36438c..d06dfe4 100644
--- a/src/possum/at_uri.gleam
+++ b/src/possum/at_uri.gleam
@@ -16,8 +16,8 @@ pub type ParseError {
   InvalidHandleAuthority(reason: handle.ParseError)
   /// Authority not a valid DID
   InvalidDidAuthority(reason: did.ParseError)
-  /// Something else went wrong
-  InvalidFormat(value: String)
+  /// Authority is an empty string
+  MissingAuthority
 }
 
 pub type Authority {
@@ -87,8 +87,8 @@ pub fn parse(content: String) -> Result(AtUri, ParseError) {
   })
 
   case string.split(value, on: "/") {
-    // Honestly I dont know how this one could happen.
-    [] -> Error(InvalidFormat(value:))
+    // `rest` is an empty string
+    [] -> Error(MissingAuthority)
 
     // Contains only authority (DID or handle)
     // ex: at://kacaii.dev