diff --git a/.openpublishing.redirection.json b/.openpublishing.redirection.json
index 344c22ff2a..daf16f5204 100644
--- a/.openpublishing.redirection.json
+++ b/.openpublishing.redirection.json
@@ -1362,7 +1362,7 @@
 "redirect_document_id": true
 },
 {
-"source_path": "windows/security/threat-protection/microsoft-defender-atp/experiment-custom-ti",
+"source_path": "windows/security/threat-protection/microsoft-defender-atp/experiment-custom-ti.md",
 "redirect_url": "https://docs.microsoft.com/windows/security/threat-protection/microsoft-defender-atp/manage-indicators",
 "redirect_document_id": true
 },