diff --git a/ares/Makefile.inc b/ares/Makefile.inc
index 6f8a5cee19e77c34d72aae86852e9abd9c5215da..a0d030035843d54051b3612acc9e82ae14ae7464 100644
--- a/ares/Makefile.inc
+++ b/ares/Makefile.inc
@@ -49,6 +49,7 @@ HHEADERS = ares.h			\
   ares_library_init.h			\
   ares_llist.h				\
   ares_private.h			\
+  ares_nowarn.h				\
   ares_rules.h				\
   ares_strcasecmp.h			\
   ares_strdup.h				\