diff --git a/common/Makefile.in b/common/Makefile.in
index f8990fc..c977a1e 100644
--- a/common/Makefile.in
+++ b/common/Makefile.in
@@ -97,11 +97,8 @@ endif
 SOUND_SRC        += snd_mem.c snd_mix.c
 
 # Networking source files
-#
-# Uncomment the second line to add IPv6 support
 
-QW_NET_SRC     = net_udp.c net_com.c mdfour.c
-#QW_NET_SRC	= net_udp6.c net_com.c mdfour.c
+QW_NET_SRC     = @NET_SOURCE@ net_com.c mdfour.c
 
 
 ###########################################################################