diff --git a/kernel/sched.c b/kernel/sched.c
index f92a239..2c51ec0 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -56,8 +56,8 @@
 
 #include <asm/unistd.h>
 
-/*
- * Scheduler clock - returns current time in nanosec units.
+/**
+ * sched_clock - returns current scheduler clock time in nanosec units.
  * This is default implementation.
  * Architectures and sub-architectures can override this.
  */