diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c
index 7f5aa094..d99a733 100644
--- a/src/northbridge/intel/i945/gma.c
+++ b/src/northbridge/intel/i945/gma.c
@@ -343,7 +343,7 @@
 
 	for (i = 0; i < (uma_size - 256) / 4; i++) {
 		outl((i << 2) | 1, piobase);
-		outl(pphysbase + (i << 12) + 1, piobase + 4);
+		outl((pphysbase + (i << 12)) | 1, piobase + 4);
 	}
 
 	temp = read32(mmiobase + PGETBL_CTL);
@@ -521,7 +521,7 @@
 
 	for (i = 0; i < (uma_size - 256) / 4; i++) {
 		outl((i << 2) | 1, piobase);
-		outl(pphysbase + (i << 12) + 1, piobase + 4);
+		outl((pphysbase + (i << 12)) | 1, piobase + 4);
 	}
 
 	/* Clear interrupts. */
diff --git a/src/northbridge/intel/pineview/gma.c b/src/northbridge/intel/pineview/gma.c
index ba6f39c..d68c04d 100644
--- a/src/northbridge/intel/pineview/gma.c
+++ b/src/northbridge/intel/pineview/gma.c
@@ -196,7 +196,7 @@
 
 	for (i = 0; i < (8192 - 512) / 4; i++) {
 		outl((i << 2) | 1, piobase);
-		outl(physbase + (i << 12) + 1, piobase + 4);
+		outl((physbase + (i << 12)) | 1, piobase + 4);
 	}
 
 	temp = read32(mmio + PGETBL_CTL);