diff --git a/src/main.rs b/src/main.rs
index 96e4901..e1b5b74 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -345,6 +345,15 @@ pub struct Error {
     kind: ErrorKind,
 }
 
+impl Error {
+    pub(crate) fn upstream_error(&self) -> Option<&str> {
+        match self.kind {
+            ErrorKind::UploadFailed(ref msg) => Some(msg),
+            _ => None,
+        }
+    }
+}
+
 impl<T> From<T> for Error
 where
     ErrorKind: From<T>,