diff --git a/include/pthread.h b/include/pthread.h
index 3ae818b9ac7..0f4a027fe4a 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -263,6 +263,7 @@ EXTERN int pthread_getschedparam(pthread_t thread, int *policy,
                                  struct sched_param *param);
 EXTERN int pthread_setschedparam(pthread_t thread, int policy,
                                  const struct sched_param *param);
+EXTERN int pthread_setschedprio(pthread_t thread, int prio);
 
 /* Thread-specific Data Interfaces */