diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c
index 0abd42eec8..bf486a0aaf 100644
--- a/src/northbridge/intel/i945/early_init.c
+++ b/src/northbridge/intel/i945/early_init.c
@@ -175,7 +175,7 @@ static void i945_setup_bars(void)
 	printk(BIOS_DEBUG, " done.\n");
 
 	/* Enable upper 128bytes of CMOS */
-	RCBA32(0x3400) = (1 << 2);
+	RCBA32(RC) = (1 << 2);
 
 	printk(BIOS_DEBUG, "Setting up static northbridge registers...");
 	/* Set up all hardcoded northbridge BARs */