diff --git a/lib/filter.h b/lib/filter.h
index 37535cb..e6ccd33 100644
--- a/lib/filter.h
+++ b/lib/filter.h
@@ -25,6 +25,11 @@
 
 #include "if.h"
 
+/* Filter direction.  */
+#define FILTER_IN                 0
+#define FILTER_OUT                1
+#define FILTER_MAX                2
+
 /* Filter type is made by `permit', `deny' and `dynamic'. */
 enum filter_type 
 {
diff --git a/lib/zebra.h b/lib/zebra.h
index a9c76c6..5f45a3a 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -491,11 +491,6 @@
 #define SAFI_MPLS_VPN             4
 #define SAFI_MAX                  5
 
-/* Filter direction.  */
-#define FILTER_IN                 0
-#define FILTER_OUT                1
-#define FILTER_MAX                2
-
 /* Default Administrative Distance of each protocol. */
 #define ZEBRA_KERNEL_DISTANCE_DEFAULT      0
 #define ZEBRA_CONNECT_DISTANCE_DEFAULT     0