diff --git a/core/mvcc/database/src/errors.rs b/core/mvcc/database/src/errors.rs
index 7bd5bab57..6cdad8ca3 100644
--- a/core/mvcc/database/src/errors.rs
+++ b/core/mvcc/database/src/errors.rs
@@ -8,4 +8,6 @@ pub enum DatabaseError {
     WriteWriteConflict,
     #[error("transaction is terminated")]
     TxTerminated,
+    #[error("I/O error: {0}")]
+    Io(String),
 }