diff --git a/include/linux/rio.h b/include/linux/rio.h
index a90ebad..1a7b6c77 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -30,6 +30,7 @@
 #define RIO_MAX_MPORTS		8
 #define RIO_MAX_MPORT_RESOURCES	16
 #define RIO_MAX_DEV_RESOURCES	16
+#define RIO_MAX_MPORT_NAME	40
 
 #define RIO_GLOBAL_TABLE	0xff	/* Indicates access of a switch's
 					   global routing table if it
@@ -255,7 +256,7 @@
 				 */
 	enum rio_phy_type phy_type;	/* RapidIO phy type */
 	u32 phys_efptr;
-	unsigned char name[40];
+	unsigned char name[RIO_MAX_MPORT_NAME];
 	void *priv;		/* Master port private data */
 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 	struct dma_device	dma;