diff --git a/include/linux/delay.h b/include/linux/delay.h
index fc57b1c8900af7c4fa662f7cb2b9d33770a41e1d..1ddf999dab421b686f5620543e6b0626c6a7270b 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -34,4 +34,8 @@ extern unsigned long loops_per_jiffy;
 	({unsigned long msec=(n); while (msec--) udelay(1000);}))
 #endif
 
+#ifndef ndelay
+#define ndelay(x)	udelay(((x)+999)/1000)
+#endif
+
 #endif /* defined(_LINUX_DELAY_H) */