diff --git a/arch/arm/include/asm/armlinux.h b/arch/arm/include/asm/armlinux.h
index ce74cfc..2765f0d 100644
--- a/arch/arm/include/asm/armlinux.h
+++ b/arch/arm/include/asm/armlinux.h
@@ -25,7 +25,7 @@
 {
 }
 
-void armlinux_set_serial(u64)
+void armlinux_set_serial(u64 serial)
 {
 }
 #endif