diff --git a/src/northbridge/intel/i945/raminit.c b/src/northbridge/intel/i945/raminit.c
index acb009f..6b1bdb9 100644
--- a/src/northbridge/intel/i945/raminit.c
+++ b/src/northbridge/intel/i945/raminit.c
@@ -2286,10 +2286,10 @@
 
 	MCHBAR32(PMCFG) |= (1 << 4);
 
-	reg32 = MCHBAR32(0xc30);
+	reg32 = MCHBAR32(UPMC4);
 	reg32 &= 0xffffff00;
 	reg32 |= 0x01;
-	MCHBAR32(0xc30) = reg32;
+	MCHBAR32(UPMC4) = reg32;
 
 	MCHBAR32(0xb18) &= ~(1 << 21);
 }