diff --git a/ip_packet.nim b/ip_packet.nim
index 12f3a40..2a5063d 100644
--- a/ip_packet.nim
+++ b/ip_packet.nim
@@ -45,7 +45,7 @@ type
     th_sum: uint16                 # checksum
     th_urp: uint16                 # urgent pointer
 
-  Protocol* = enum
+  TransportProtocol* = enum
     tcp
     other
 
@@ -61,7 +61,7 @@ type
     ipAddrSrc*: IpAddress
     ipAddrDst*: IpAddress
     ipTTL*: uint8
-    case protocol*: Protocol
+    case protocol*: TransportProtocol
     of tcp:
       tcpPortSrc*: Port
       tcpPortDst*: Port