# define SIG_SUSPEND SIGPWR
# endif
# else /* !GC_LINUX_THREADS */
-# define SIG_SUSPEND _SIGRTMIN + 6
+# if defined(_SIGRTMIN)
+# define SIG_SUSPEND _SIGRTMIN + 6
+# else
+# define SIG_SUSPEND SIGRTMIN + 6
+# endif
# endif
# endif /* !SIG_SUSPEND */