If you’ve tried updating suckless.org’s Simple Term, st, and run into this error:

In file included from x.c:61:
config.h:180:42: error: ‘iso14755’ undeclared here (not in a function)
  { TERMMOD,              XK_I,           iso14755,       {.i =  0} },

make: *** [Makefile:22: x.o] Error 1

You’re probably working off of a config.h that you generated when ISO 14755 mode was a feature in st, which was removed in 67d0cb6. Remove the line indicated in the error message from your config.h and make should run without further issue.