diff --git a/headers/private/kernel/lock.h b/headers/private/kernel/lock.h
index b2b519fd4c..6a61ab72b4 100755
--- a/headers/private/kernel/lock.h
+++ b/headers/private/kernel/lock.h
@@ -61,6 +61,16 @@ extern void mutex_unlock(mutex *m);
 extern status_t benaphore_init(benaphore *ben, const char *name);
 extern void benaphore_destroy(benaphore *ben);
 
+static inline status_t
+benaphore_lock_etc(benaphore *ben, uint32 flags, bigtime_t timeout)
+{
+	if (atomic_add(&ben->count, -1) <= 0)
+		return acquire_sem_etc(ben->sem, 1, flags, timeout);
+
+	return B_OK;
+}
+
+
 static inline status_t
 benaphore_lock(benaphore *ben)
 {