diff --git a/board/freescale/mpc8544ds/mpc8544ds.c b/board/freescale/mpc8544ds/mpc8544ds.c
index b251e2e..fd59839 100644
--- a/board/freescale/mpc8544ds/mpc8544ds.c
+++ b/board/freescale/mpc8544ds/mpc8544ds.c
@@ -391,11 +391,12 @@
 {
 	u8 i, go_bit, rd_clks;
 	ulong val = 0;
+	u8 *pixis_base = (u8 *)PIXIS_BASE;
 
-	go_bit = in8(PIXIS_BASE + PIXIS_VCTL);
+	go_bit = in_8(pixis_base + PIXIS_VCTL);
 	go_bit &= 0x01;
 
-	rd_clks = in8(PIXIS_BASE + PIXIS_VCFGEN0);
+	rd_clks = in_8(pixis_base + PIXIS_VCFGEN0);
 	rd_clks &= 0x1C;
 
 	/*
@@ -406,11 +407,11 @@
 
 	if (go_bit) {
 		if (rd_clks == 0x1c)
-			i = in8(PIXIS_BASE + PIXIS_AUX);
+			i = in_8(pixis_base + PIXIS_AUX);
 		else
-			i = in8(PIXIS_BASE + PIXIS_SPD);
+			i = in_8(pixis_base + PIXIS_SPD);
 	} else {
-		i = in8(PIXIS_BASE + PIXIS_SPD);
+		i = in_8(pixis_base + PIXIS_SPD);
 	}
 
 	i &= 0x07;