--- ../info_subscriber.c.orig	2018-09-13 21:27:28.615555253 +0200
+++ ./opal/util/info_subscriber.c	2018-09-13 21:27:59.179378432 +0200
@@ -27,7 +27,9 @@
 
 #include <string.h>
 #include <errno.h>
+#ifdef HAVE_STDLIB_H
 #include <stdlib.h>
+#endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif