diff --git a/actix-multipart/src/error.rs b/actix-multipart/src/error.rs
index 6677f69c7..cdbb5d395 100644
--- a/actix-multipart/src/error.rs
+++ b/actix-multipart/src/error.rs
@@ -33,6 +33,8 @@ pub enum MultipartError {
     NotConsumed,
 }
 
+impl std::error::Error for MultipartError {}
+
 /// Return `BadRequest` for `MultipartError`
 impl ResponseError for MultipartError {
     fn status_code(&self) -> StatusCode {