diff --git a/headers/os/kernel/OS.h b/headers/os/kernel/OS.h
index e02fa95738..2282f99012 100644
--- a/headers/os/kernel/OS.h
+++ b/headers/os/kernel/OS.h
@@ -1,6 +1,6 @@
 /* Kernel specific structures and functions
 **
-** Distributed under the terms of the OpenBeOS License.
+** Distributed under the terms of the Haiku License.
 */
 #ifndef _OS_H
 #define _OS_H
@@ -151,7 +151,6 @@ enum {
 
 extern sem_id	create_sem(int32 count, const char *name);
 extern status_t	delete_sem(sem_id id);
-extern status_t	delete_sem_etc(sem_id id, status_t returnCode, bool interrupted); /* ToDo: not public BeOS */
 extern status_t	acquire_sem(sem_id id);
 extern status_t	acquire_sem_etc(sem_id id, int32 count, uint32 flags, bigtime_t timeout);
 extern status_t	release_sem(sem_id id);