diff --git a/cpu/arm1136/mx31/timer.c b/cpu/arm1136/mx31/timer.c
index 29b484e..7972ba0 100644
--- a/cpu/arm1136/mx31/timer.c
+++ b/cpu/arm1136/mx31/timer.c
@@ -152,7 +152,7 @@
 }
 
 /* delay x useconds AND perserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;