diff --git a/arch/arm/mach-s3c2410/mach-amlm5900.c b/arch/arm/mach-s3c2410/mach-amlm5900.c
index c475422..a86d68d 100644
--- a/arch/arm/mach-s3c2410/mach-amlm5900.c
+++ b/arch/arm/mach-s3c2410/mach-amlm5900.c
@@ -174,6 +174,7 @@
 
 	.type		= S3C2410_LCDCON1_STN4,
 
+	.pixclock	= 680000, /* HCLK = 100MHz */
 	.xres		= 160,
 	.yres		= 160,
 	.bpp		= 4,