diff --git a/libc/include/pthread.h b/libc/include/pthread.h
index 6603b3f..c0aa4b9 100644
--- a/libc/include/pthread.h
+++ b/libc/include/pthread.h
@@ -226,6 +226,8 @@
 
 int pthread_once(pthread_once_t  *once_control, void (*init_routine)(void));
 
+int pthread_setname_np(pthread_t thid, const char *thname);
+
 typedef void  (*__pthread_cleanup_func_t)(void*);
 
 typedef struct __pthread_cleanup_t {