diff -r 029d5efaaa6c -r b7c7428eaab9 src/hotspot/share/utilities/globalDefinitions_xlc.hpp
--- a/src/hotspot/share/utilities/globalDefinitions_xlc.hpp	Mon Oct 30 16:37:53 2017 +0100
+++ b/src/hotspot/share/utilities/globalDefinitions_xlc.hpp	Tue Oct 31 11:55:09 2017 -0400
@@ -86,6 +86,7 @@
 // In this case you need to copy the following defines to a position after #include <dirent.h>
 // (see jmv_aix.h).
 #ifdef AIX
+  #include <dirent.h>
   #ifdef _LP64
     #undef NULL
     #define NULL 0L