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-rw-r--r--resolv/res_hconf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/resolv/res_hconf.c b/resolv/res_hconf.c
index b4c86227f8..cde0229330 100644
--- a/resolv/res_hconf.c
+++ b/resolv/res_hconf.c
@@ -358,7 +358,7 @@ _res_hconf_init (void)
 }
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # if defined SIOCGIFCONF && defined SIOCGIFNETMASK
 /* List of known interfaces.  */
 libc_freeres_ptr (