--- a/libc/sysdeps/linux/common/sched_getaffinity.c
+++ b/libc/sysdeps/linux/common/sched_getaffinity.c
@@ -29,6 +29,7 @@
 #include <sys/param.h>
 #include <sys/types.h>
 
+#ifdef __NR_sched_getaffinity
 libc_hidden_proto(memset)
 
 #define __NR___syscall_sched_getaffinity __NR_sched_getaffinity
@@ -48,5 +49,15 @@ int sched_getaffinity(pid_t pid, size_t 
 	}
 	return res;
 }
+#else
+/*
+int sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *cpuset)
+{
+	__set_errno(ENOSYS);
+	return -1;
+}
+*/
 #endif
 #endif
+
+#endif
--- a/libc/sysdeps/linux/common/sched_setaffinity.c
+++ b/libc/sysdeps/linux/common/sched_setaffinity.c
@@ -31,6 +31,7 @@
 #include <sys/types.h>
 #include <alloca.h>
 
+#ifdef __NR_sched_setaffinity
 libc_hidden_proto(getpid)
 
 #define __NR___syscall_sched_setaffinity __NR_sched_setaffinity
@@ -74,5 +75,14 @@ int sched_setaffinity(pid_t pid, size_t 
 
 	return INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
 }
+#else
+/*
+int sched_setaffinity(pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
+{
+	__set_errno(ENOSYS);
+	return -1;
+}
+*/
+#endif
 #endif
 #endif