diff --git a/configure.ng b/configure.ng
index 28ababbf..b8bcd24d 100644
--- a/configure.ng
+++ b/configure.ng
@@ -101,6 +101,7 @@ AC_DEFUN([WORKING_GETADDRINFO],[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#include <string.h>
 int
 main(int argc, char **argv)
 {