diff --git a/arch/powerpc/cpu/mpc8xx/cpu.c b/arch/powerpc/cpu/mpc8xx/cpu.c
index b6b733d..dc33eb3 100644
--- a/arch/powerpc/cpu/mpc8xx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xx/cpu.c
@@ -78,7 +78,8 @@
 	if ((pvr >> 16) != 0x0050)
 		return -1;
 
-	k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
+	k = (immr << 16) |
+		immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
 	m = 0;
 	suf = "";
 
@@ -194,7 +195,8 @@
 	if ((pvr >> 16) != 0x0050)
 		return -1;
 
-	k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
+	k = (immr << 16) |
+		immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
 	m = 0;
 
 	switch (k) {
@@ -253,7 +255,8 @@
 	if ((pvr >> 16) != 0x0050)
 		return -1;
 
-	k = (immr << 16) | in_be16((ushort *)&immap->im_cpm.cp_dparam[0xB0]);
+	k = (immr << 16) |
+		in_be16(&immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)]);
 	m = 0;
 
 	switch (k) {
@@ -312,7 +315,8 @@
 	if ((pvr >> 16) != 0x0050)
 		return -1;
 
-	k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
+	k = (immr << 16) |
+		immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
 	m = 0;
 
 	switch (k) {