diff --git a/arch/arm/mach-s3c6410/mach-hmt.c b/arch/arm/mach-s3c6410/mach-hmt.c
index cdd4b5378552..7619456f2ae8 100644
--- a/arch/arm/mach-s3c6410/mach-hmt.c
+++ b/arch/arm/mach-s3c6410/mach-hmt.c
@@ -82,7 +82,7 @@ static int hmt_bl_init(struct device *dev)
 	return ret;
 }
 
-static int hmt_bl_notify(int brightness)
+static int hmt_bl_notify(struct device *dev, int brightness)
 {
 	/*
 	 * translate from CIELUV/CIELAB L*->brightness, E.G. from