diff --git a/changelog/unreleased/pull-2139 b/changelog/unreleased/pull-2139
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index 000000000..7371b7f3c
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+Enhancement: Return error if no bytes could be read for `backup --stdin`
+
+When restic is used to backup the output of a program, like `mysqldump | restic
+backup --stdin`, it now returns an error if no bytes could be read at all. This
+catches the failure case when `mysqldump` failed for some reason and did not
+output any data to stdout.
+
+https://github.com/restic/restic/pull/2139