diff --git a/IkiWiki/Plugin/attachment.pm b/IkiWiki/Plugin/attachment.pm
index 2a662c0d1..acc52f0e9 100644
--- a/IkiWiki/Plugin/attachment.pm
+++ b/IkiWiki/Plugin/attachment.pm
@@ -32,7 +32,7 @@ sub check_canattach ($$;$) {
 		}
 	}
 	if (! $allowed) {
-		error(gettext("attachment rejected")." ($allowed)");
+		error(gettext("prohibited by allowed_attachments")." ($allowed)");
 	}
 	else {
 		return 1;