Uncrustify proposes the following patch: --- a/sys/include/ztimer/xtimer_compat.h +++ b/sys/include/ztimer/xtimer_compat.h @@ -69,8 +69,9 @@ extern "C" { * @brief Generate a link-time failure if a function is used that can not be * implemented with the selected backends. */ -#define _XTIMER_BACKEND_NOT_IMPLEMENTED extern void xtimer_function_called_but_no_backend_available(void); \ - xtimer_function_called_but_no_backend_available() +#define _XTIMER_BACKEND_NOT_IMPLEMENTED extern void xtimer_function_called_but_no_backend_available( \ + void); \ + xtimer_function_called_but_no_backend_available() typedef ztimer_t xtimer_t; typedef uint32_t xtimer_ticks32_t;