diff --git a/sys/dev/etherswitch/etherswitch.h b/sys/dev/etherswitch/etherswitch.h
index de4192470dbb..02bf91cd613c 100644
--- a/sys/dev/etherswitch/etherswitch.h
+++ b/sys/dev/etherswitch/etherswitch.h
@@ -14,7 +14,7 @@ extern driver_t         etherswitch_driver;
 #endif /* _KERNEL */
 
 struct etherswitch_reg {
-	uint16_t	reg;
+	uint32_t	reg;
 	uint32_t	val;
 };
 typedef struct etherswitch_reg etherswitch_reg_t;