diff --git a/src/doc/rustc-dev-guide/triagebot.toml b/src/doc/rustc-dev-guide/triagebot.toml
index 12aa0b7b8ff1..61093ecaaadf 100644
--- a/src/doc/rustc-dev-guide/triagebot.toml
+++ b/src/doc/rustc-dev-guide/triagebot.toml
@@ -9,3 +9,6 @@ allow-unauthenticated = [
 
 # Automatically close and reopen PRs made by bots to run CI on them
 [bot-pull-requests]
+
+[behind-upstream]
+days-threshold = 7
\ No newline at end of file