diff --git a/scripts/rf_raw_request.py b/scripts/rf_raw_request.py
index 4b4f5ab..946dba2 100644
--- a/scripts/rf_raw_request.py
+++ b/scripts/rf_raw_request.py
@@ -15,6 +15,7 @@
 import json
 import os
 import redfish
+import re
 
 # Get the input arguments
 argget = argparse.ArgumentParser( description = "A tool perform a raw request to a Redfish service" )
@@ -27,6 +28,17 @@
 argget.add_argument( "--verbose", "-v", action = "store_true", help = "Indicates if HTTP response codes and headers are displayed", default = False )
 args = argget.parse_args()
 
+def ifmatch_header(redfish_obj, path, headers=None):
+    if headers is None:
+        headers = {}
+    try:
+        response = redfish_obj.get(path)
+        etag = response.getheader( "ETag" )
+        if etag is not None:
+            headers[ "If-Match"] = etag
+    except Exception:
+        pass
+    return headers
 # Connect to the service
 with redfish.redfish_client( base_url = args.rhost, username = args.user, password = args.password ) as redfish_obj:
     # Encode the body
@@ -50,9 +62,11 @@
     elif args.method == "POST":
         resp = redfish_obj.post( args.request, body = body )
     elif args.method == "PATCH":
-        resp = redfish_obj.patch( args.request, body = body )
+	headers = ifmatch_header(redfish_obj, args.request, headers = headers)
+        resp = redfish_obj.patch( args.request, body = body, headers = headers)
     elif args.method == "PUT":
-        resp = redfish_obj.put( args.request, body = body )
+	headers = ifmatch_header(redfish_obj, args.request, headers = headers)
+        resp = redfish_obj.put( args.request, body = body, headers = headers)
     elif args.method == "DELETE":
         resp = redfish_obj.delete( args.request )
     else: