diff --git a/lib_sh/time_sh2.c b/lib_sh/time_sh2.c
index 5c6c9d4..789b46f 100644
--- a/lib_sh/time_sh2.c
+++ b/lib_sh/time_sh2.c
@@ -103,7 +103,7 @@
 	cmt_timer_start(0);
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long end = get_usec() + usec;