1 files changed, 4 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs
index 1e750e5..3b3f573 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,4 @@
+use std::path::PathBuf;
 use thiserror::Error;
 
 /// Define all the kinds of errors any part of this crate can return.
@@ -5,4 +6,7 @@ use thiserror::Error;
 pub enum ObnamError {
     #[error("Can't find backup '{0}'")]
     UnknownGeneration(String),
+
+    #[error("Generation has more than one file with the name {0}")]
+    TooManyFiles(PathBuf),
 }