diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 89d0a6a88df7..ebf51ad1b714 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -676,10 +676,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 			min_align = align1 >> 1;
 		align += aligns[order];
 	}
-	size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), align);
+	size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align);
 	size1 = !add_size ? size :
 		calculate_memsize(size, min_size+add_size, 0,
-				resource_size(b_res), align);
+				resource_size(b_res), min_align);
 	if (!size0 && !size1) {
 		if (b_res->start || b_res->end)
 			dev_info(&bus->self->dev, "disabling bridge window "