diff --git a/src/include/device/resource.h b/src/include/device/resource.h
index 6b66605a6a..4bd9698e2c 100644
--- a/src/include/device/resource.h
+++ b/src/include/device/resource.h
@@ -21,7 +21,7 @@
 						 * to the bus below.
 						 */
 #define IORESOURCE_BRIDGE	0x00080000	/* The IO resource has a bus below it. */
-
+#define IORESOURCE_WRCOMB	0x00100000	/* Write combining resource. */
 #define IORESOURCE_RESERVE	0x10000000	/* The resource needs to be reserved in the coreboot table */
 #define IORESOURCE_STORED	0x20000000	/* The IO resource assignment has been stored in the device */
 #define IORESOURCE_ASSIGNED	0x40000000	/* An IO resource that has been assigned a value */