diff --git a/libimagmail/src/error.rs b/libimagmail/src/error.rs
index 59664b66..a87548d6 100644
--- a/libimagmail/src/error.rs
+++ b/libimagmail/src/error.rs
@@ -2,6 +2,9 @@ generate_error_module!(
     generate_error_types!(MailError, MailErrorKind,
         RefCreationError => "Error creating a reference to a file/directory",
         MailParsingError => "Error while parsing mail",
+
+        FetchByHashError => "Error fetching mail from Store by hash",
+        FetchError       => "Error fetching mail from Store",
         IOError => "IO Error"
     );
 );