diff --git a/scapy/layers/netbios.py b/scapy/layers/netbios.py
index bb0d15868a35008b239eb7aa702b38ec244fe97c..3253c52f04487ad665fcefaa03938a8acd28ec07 100644
--- a/scapy/layers/netbios.py
+++ b/scapy/layers/netbios.py
@@ -83,7 +83,7 @@ class NBNSRequest(Packet):
                    IntField("TTL", 0),
                    ShortField("RDLENGTH", 6),
                    BitEnumField("G",0,1,{0:"Unique name",1:"Group name"}),
-                   BitEnumField("OWNER NODE TYPE",00,2,{00:"B node",01:"P node",02:"M node",03:"H node"}),
+                   BitEnumField("OWNER_NODE_TYPE",00,2,{00:"B node",01:"P node",02:"M node",03:"H node"}),
                    BitEnumField("UNUSED",0,13,{0:"Unused"}),
                    IPField("NB_ADDRESS", "127.0.0.1")]
 
@@ -125,7 +125,7 @@ class NBNSQueryResponseNegative(Packet):
                    IntField("TTL",0),
                    ShortField("RDLENGTH",6),
                    BitEnumField("G",0,1,{0:"Unique name",1:"Group name"}),
-                   BitEnumField("OWNER NODE TYPE",00,2,{00:"B node",01:"P node",02:"M node",03:"H node"}),
+                   BitEnumField("OWNER_NODE_TYPE",00,2,{00:"B node",01:"P node",02:"M node",03:"H node"}),
                    BitEnumField("UNUSED",0,13,{0:"Unused"}),
                    IPField("NB_ADDRESS", "127.0.0.1")]