diff --git a/network_interface.nim b/network_interface.nim
index 3000b3e..8fd38b1 100644
--- a/network_interface.nim
+++ b/network_interface.nim
@@ -4,6 +4,7 @@ from posix import SockAddr, Sockaddr_in, inet_ntoa, AF_INET
 type
   NetworkInterface* = object
     ipAddress*: string
+    netMask*: string
     name*: string
     index*: cint
     flags*: cuint
@@ -34,6 +35,7 @@ proc fromIpAddress*(address: string): NetworkInterface =
        it.ifa_addr.sa_family.cint == AF_INET and
        it.ifa_addr.getAddrString() == address:
       result.ipAddress = address
+      result.netMask = it.ifa_netmask.getAddrString()
       result.name = $it.ifa_name
       result.index = if_nametoindex(result.name).cint
       result.flags = it.ifa_flags