C error when using C type from lib in function pointer declaration

[ArtemkaKun]

C compiler output:
/home/yuart/Projects/spawn/out.c:45:28: error: expected declaration specifiers or ‘...’ before ‘*’ token
   45 | typedef tellusim___Bool_t (*fn_void$ptr$tellusim___Bool_t)(void*);
      |                            ^
/home/yuart/Projects/spawn/out.c:56:9: error: unknown type name ‘fn_void$ptr$tellusim___Bool_t’
   56 | typedef fn_void$ptr$tellusim___Bool_t tellusim___TSWindowMainLoopCallback;
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

pub type TSWindowMainLoopCallback = fn (data unsafe &void) -> Bool_t

fn_void$ptr$tellusim___Bool_t is present in generated C code, it's just declared below its usage