diff --git a/openflow.lua b/openflow.lua
index ea6dc68..c74d421 100644
--- a/openflow.lua
+++ b/openflow.lua
@@ -68,7 +68,7 @@
     return self
 end
 
-p_of = Proto ("of", "OpenFlow")
+p_of = Proto ("of", "OF")
 ethernet_dissector = Dissector.get("eth")
 
 current_pkt = nil