diff --git a/include/pthread.h b/include/pthread.h
index a47406aa..d40002e6 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -5,6 +5,7 @@ extern "C" {
 #endif
 
 #define __NEED_time_t
+#define __NEED_clockid_t
 #define __NEED_struct_timespec
 #define __NEED_sigset_t
 #define __NEED_pthread_t