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-rw-r--r--resolv/netdb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/resolv/netdb.h b/resolv/netdb.h
index 5aaa387166..238510f0e4 100644
--- a/resolv/netdb.h
+++ b/resolv/netdb.h
@@ -577,6 +577,7 @@ struct gaicb
 #  define AI_IDN	0x0040	/* IDN encode input (assuming it is encoded
 				   in the current locale's character set)
 				   before looking it up. */
+#  define AI_CANONIDN	0x0080	/* Translate canonical name from IDN format. */
 # endif
 
 /* Error values for `getaddrinfo' function.  */