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-rw-r--r--isisd/isis_misc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/isisd/isis_misc.h b/isisd/isis_misc.h
index 91bd2489..3b975895 100644
--- a/isisd/isis_misc.h
+++ b/isisd/isis_misc.h
@@ -35,7 +35,7 @@ struct in_addr newprefix2inaddr (u_char * prefix_start,
* return value of 0 indicates wrong input
*/
int dotformat2buff (u_char *, u_char *);
-int sysid2buff (u_char *, u_char *);
+int sysid2buff (u_char *, const u_char *);
/*
* Printing functions