diff --git a/userspace/libwr/include/libwr/rtu_shmem.h b/userspace/libwr/include/libwr/rtu_shmem.h
index 6969b7e41ad9c4d7cf8b9875b1832a93634d1941..15d69d019a782ee22a1eee1441ccffdf20349e60 100644
--- a/userspace/libwr/include/libwr/rtu_shmem.h
+++ b/userspace/libwr/include/libwr/rtu_shmem.h
@@ -9,6 +9,9 @@
 #define LAST_HTAB_ENTRY	((HTAB_ENTRIES)-1)
 #define LAST_RTU_BUCKET	(RTU_BUCKETS-1)
 
+/* Maximum number of supported VLANs */
+#define NUM_VLANS               4096
+
 #define ETH_ALEN 6
 #define ETH_ALEN_STR 18
 
diff --git a/userspace/wrsw_rtud/rtu.h b/userspace/wrsw_rtud/rtu.h
index 6408878b2e6dde939391d060657c37e0008d2c45..e236811a7c81d889a70223285729dbe43c339d2e 100644
--- a/userspace/wrsw_rtud/rtu.h
+++ b/userspace/wrsw_rtud/rtu.h
@@ -43,9 +43,6 @@
 #define MIN_PORT 0
 #define MAX_PORT 17
 
-// Maximum number of supported VLANs
-#define NUM_VLANS               4096
-
 #define NUM_RESERVED_ADDR       16
 
 // Default aging time for dynamic entries at filtering database [secs]