diff --git a/endpoints/api/secscan.py b/endpoints/api/secscan.py
index c05e40fef..b4b3681fc 100644
--- a/endpoints/api/secscan.py
+++ b/endpoints/api/secscan.py
@@ -47,7 +47,7 @@ def _call_security_api(relative_url, *args, **kwargs):
 
 
 def _get_status(repo_image):
-  if repo_image.security_indexed_engine:
+  if repo_image.security_indexed_engine is not None and repo_image.security_indexed_engine >= 0:
     return SCAN_STATUS.SCANNED if repo_image.security_indexed else SCAN_STATUS.FAILED
 
   return SCAN_STATUS.QUEUED