diff --git a/waf/radware.py b/waf/radware.py
index 8cd65b125..3f1f356e7 100644
--- a/waf/radware.py
+++ b/waf/radware.py
@@ -17,6 +17,7 @@ def detect(get_page):
     for vector in WAF_ATTACK_VECTORS:
         page, headers, code = get_page(get=vector)
         retval = re.search(r"Unauthorized Activity Has Been Detected.+Case Number:", page, re.I | re.S) is not None
+        retval |= headers.get("X-SL-CompState") is not None
         if retval:
             break