diff --git a/lib/core/common.py b/lib/core/common.py
index ef6d340c7..afcc9a152 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -3457,9 +3457,7 @@ def getRequestHeader(request, name):
 
     retVal = None
     if request and name:
-        retVal = max(request.get_header(_) if name.upper() == _.upper() else None for _ in request.headers.keys())
-        if not retVal and request.unredirected_hdrs:
-            retVal = max(request.unredirected_hdrs.get(_) if name.upper() == _.upper() else None for _ in request.unredirected_hdrs.keys())
+        retVal = max(value if name.upper() == key.upper() else None for key, value in request.header_items())
     return retVal
 
 def isNumber(value):