diff --git a/ares/configure.ac b/ares/configure.ac
index 962ee20f2409aa5ee365b74f4d192f8ee6eabbd3..b28c892d13b0f610c34b0d2d1c2997ae35be5f7d 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -67,6 +67,8 @@ AC_CHECK_HEADERS(
        sys/socket.h \
        winsock.h \
        netinet/in.h \
+       arpa/nameser.h \
+       arpa/nameser_compat.h
   )
 
 dnl check for AF_INET6