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-rw-r--r--include/resolv.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/resolv.h b/include/resolv.h
index cdedd274..259e4bc1 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -134,7 +134,7 @@ int res_search(const char *, int, int, unsigned char *, int);
 int res_mkquery(int, const char *, int, int, char *, int, struct rrec *, char *, int);
 int res_send(const char *, int, char *, int);
 int dn_comp(unsigned char *, unsigned char *, int, unsigned char **, unsigned char *, unsigned char **);
-int dn_expand(unsigned char *, unsigned char *, unsigned char *, unsigned char *, int);
+int dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
 int dn_skipname(const unsigned char *, const unsigned char *);
 
 #ifdef __cplusplus