diff --git a/src/core/nginx.c b/src/core/nginx.c
index 639c1cf082..5921c96006 100755
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -1551,7 +1551,7 @@ ngx_get_cpu_affinity(ngx_uint_t n)
     ngx_cpuset_t     *mask;
     ngx_core_conf_t  *ccf;
 
-#if (T_NGX_HAVE_SCHED_GETAFFINITY)
+#if (T_NGX_HAVE_SCHED_GETAFFINITY && NGX_HAVE_SC_NPROCESSORS_ONLN && NGX_HAVE_SC_NPROCESSORS_CONF)
     ngx_int_t         worker_i, machine_core, all_machine_cores;
 #endif
 
diff --git a/src/os/unix/ngx_getaffinity.h b/src/os/unix/ngx_getaffinity.h
index e2c78dd9a5..18b0417970 100644
--- a/src/os/unix/ngx_getaffinity.h
+++ b/src/os/unix/ngx_getaffinity.h
@@ -3,21 +3,19 @@
  * Copyright (C) lhanjian (lhjay1@gmail.com)
  */
 
-#ifndef _NGX_SETAFFINITY_H_INCLUDED_
-#define _NGX_SETAFFINITY_H_INCLUDED_
+#ifndef _NGX_GETAFFINITY_H_INCLUDED_
+#define _NGX_GETAFFINITY_H_INCLUDED_
 
 
-#if (NGX_HAVE_SCHED_SETAFFINITY)
-
-#define NGX_HAVE_CPU_AFFINITY 1
+#if (T_NGX_HAVE_SCHED_GETAFFINITY)
 
 typedef cpu_set_t  ngx_cpuset_t;
 
-void ngx_setaffinity(ngx_cpuset_t *cpu_affinity, ngx_log_t *log);
+void ngx_getaffinity(ngx_cpuset_t *cpu_affinity, ngx_log_t *log);
 
 #else
 
-#define ngx_setaffinity(cpu_affinity, log)
+#define ngx_getaffinity(cpu_affinity, log)
 
 typedef uint64_t  ngx_cpuset_t;