diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
index d8e687b..d8afbf3 100644
--- a/bgpd/bgpd.h
+++ b/bgpd/bgpd.h
@@ -795,9 +795,6 @@
 #define BGP_IS_VALID_STATE_FOR_NOTIF(S)\
         (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
 
-/* Count prefix size from mask length */
-#define PSIZE(a) (((a) + 7) / (8))
-
 /* BGP error codes.  */
 #define BGP_SUCCESS                               0
 #define BGP_ERR_INVALID_VALUE                    -1
diff --git a/ripngd/ripngd.h b/ripngd/ripngd.h
index 75b542e..93f6ff1 100644
--- a/ripngd/ripngd.h
+++ b/ripngd/ripngd.h
@@ -337,9 +337,6 @@
      } \
 } while (0)
 
-/* Count prefix size from mask length */
-#define PSIZE(a) (((a) + 7) / (8))
-
 /* Extern variables. */
 extern struct ripng *ripng;
 
diff --git a/zebra/zserv.h b/zebra/zserv.h
index fc01f96..413cd6a 100644
--- a/zebra/zserv.h
+++ b/zebra/zserv.h
@@ -84,9 +84,6 @@
   struct meta_queue *mq;
 };
 
-/* Count prefix size from mask length */
-#define PSIZE(a) (((a) + 7) / (8))
-
 /* Prototypes. */
 extern void zebra_init (void);
 extern void zebra_if_init (void);