diff --git a/extras/packetforge/packetforge.py b/extras/packetforge/packetforge.py
index 6a419bc..4f149dc 100644
--- a/extras/packetforge/packetforge.py
+++ b/extras/packetforge/packetforge.py
@@ -145,7 +145,7 @@
     if "format" in item:
         format = item["format"]
         if format == "mac":
-            mask = "ff.ff.ff.ff.ff.ff"
+            mask = "ff:ff:ff:ff:ff:ff"
         elif format == "ipv4":
             mask = "255.255.255.255"
         elif format == "ipv6":
diff --git a/extras/packetforge/parsegraph/nodes/gtppsc.json b/extras/packetforge/parsegraph/nodes/gtppsc.json
index d6814be..bf0ac11 100644
--- a/extras/packetforge/parsegraph/nodes/gtppsc.json
+++ b/extras/packetforge/parsegraph/nodes/gtppsc.json
@@ -4,7 +4,7 @@
     "layout" : [
         {
             "name" : "length",
-            "size" : "1",
+            "size" : "8",
             "default" : "1",
             "readonly" : "true"
         },
@@ -23,6 +23,10 @@
         {
             "name" : "qfi",
             "size" : "6"
+        },
+        {
+            "name" : "nextext",
+            "size" : "8"
         }
     ]
 }