-void rtmin0_handler(int signal, siginfo_t *info, os_context_t *context);
-void rtmin1_handler(int signal, siginfo_t *info, os_context_t *context);
+# ifdef LISP_FEATURE_SB_THRUPTION
+void thruption_handler(int signal, siginfo_t *info, os_context_t *context);
+# endif