modes.h defines #if defined(IRC_BAHAMUT) || defined(IRC_UNREAL) # define CMODE_c 0x00000400 /* No ANSI colors in channel */ # define CMODE_O 0x00000800 /* Only opers can join channel */ #endif However, in modes.c the code is: #ifdef IRC_BAHAMUT { 'c', CMODE_c }, { 'O', CMODE_O }, #endif making them inaccessible to an Unreal build.