diff --git a/src/soc/intel/common/block/lpc/lpc.c b/src/soc/intel/common/block/lpc/lpc.c
index b27e09e9..e805035 100644
--- a/src/soc/intel/common/block/lpc/lpc.c
+++ b/src/soc/intel/common/block/lpc/lpc.c
@@ -91,7 +91,7 @@
 		return;
 
 	for (res = dev->resource_list; res; res = res->next) {
-		if (res->flags & IORESOURCE_IO)
+		if ((res->flags & IORESOURCE_IO) && (res->flags & IORESOURCE_ASSIGNED))
 			lpc_open_pmio_window(res->base, res->size);
 	}
 	pch_lpc_set_child_resources(dev);