diff --git a/sys/netgraph/ng_frame_relay.c b/sys/netgraph/ng_frame_relay.c
index e6dcd728e6ed..b86a31bab130 100644
--- a/sys/netgraph/ng_frame_relay.c
+++ b/sys/netgraph/ng_frame_relay.c
@@ -99,7 +99,7 @@ typedef struct frmrel_softc *sc_p;
 #define LASTBYTE_D_C	0x02	/* last byte is dl_core or dlci info */
 
 /* Used to do headers */
-static struct segment {
+const static struct segment {
 	u_char  mask;
 	u_char  shift;
 	u_char  width;