--- configure.ac	(Asterisk 15.2)
+++ configure.ac	(working copy)
@@ -606,2 +606,7 @@
 
+AC_HEADER_RESOLV
+if test "$ac_cv_header_resolv_h" != "yes"; then
+  AC_MSG_ERROR([*** resolv.h is required.])
+fi
+
 # Check for headers that are unconditionally required on all platforms.  Do not use
@@ -610,3 +615,3 @@
   arpa/nameser.h assert.h ctype.h dlfcn.h errno.h fcntl.h float.h grp.h \
-  inttypes.h limits.h locale.h math.h pwd.h netinet/in.h regex.h resolv.h \
+  inttypes.h limits.h locale.h math.h pwd.h netinet/in.h regex.h \
   sched.h stdarg.h stdint.h stdio.h stdlib.h string.h syslog.h \