diff --git a/board/ads5121/ads5121_diu.c b/board/ads5121/ads5121_diu.c
index 87cf0cb..26628d3 100644
--- a/board/ads5121/ads5121_diu.c
+++ b/board/ads5121/ads5121_diu.c
@@ -57,7 +57,7 @@
 	/* Modify PXCLK in GUTS CLKDVDR */
 	debug("DIU: Current value of CLKDVDR = 0x%08x\n", *clkdvdr);
 	temp = *clkdvdr & 0xFFFFFF00;
-	*clkdvdr = temp | (pixval & 0x1F);
+	*clkdvdr = temp | (pixval & 0xFF);
 	debug("DIU: Modified value of CLKDVDR = 0x%08x\n", *clkdvdr);
 }