diff --git a/lib/syscall/sleep.s b/lib/syscall/sleep.s
index a5394ef36..c395c9fb7 100755
--- a/lib/syscall/sleep.s
+++ b/lib/syscall/sleep.s
@@ -6,8 +6,3 @@
 _sleep:
 	jmp	__sleep
 
-.extern	__nanosleep
-.define	_nanosleep
-
-_nanosleep:
-	jmp	__nanosleep