diff --git a/ChangeLog b/ChangeLog
index d923c6444f..9bdd0a48bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,7 @@
 	* sysdeps/mach/hurd/xmknodat.c: Include <sys/sysmacros.h>.
 	* sysdeps/mach/hurd/profil.c: Reuse `a' variable instead of introducing
 	a `c' variable.
+	* resolv/res-close.c: Include <stdlib.h>.
 
 2018-01-27  James Clarke  <jrtc27@jrtc27.com>
 
diff --git a/resolv/res-close.c b/resolv/res-close.c
index 43b9292857..e02f5afa15 100644
--- a/resolv/res-close.c
+++ b/resolv/res-close.c
@@ -86,6 +86,7 @@
 #include <resolv_context.h>
 #include <resolv_conf.h>
 #include <not-cancel.h>
+#include <stdlib.h>
 
 /* Close all open sockets.  If FREE_ADDR is true, deallocate any
    separately allocated name server addresses.  */