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-rw-r--r--lib/prefix.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/prefix.h b/lib/prefix.h
index cc4bbe280d..7fef37e3ff 100644
--- a/lib/prefix.h
+++ b/lib/prefix.h
@@ -179,7 +179,7 @@ extern void prefix_free (struct prefix *);
extern const char *prefix_family_str (const struct prefix *);
extern int prefix_blen (const struct prefix *);
extern int str2prefix (const char *, struct prefix *);
-extern int prefix2str (const struct prefix *, char *, int);
+extern const char *prefix2str (union prefix46constptr, char *, int);
extern int prefix_match (const struct prefix *, const struct prefix *);
extern int prefix_same (const struct prefix *, const struct prefix *);
extern int prefix_cmp (const struct prefix *, const struct prefix *);