--- old/src/hotspot/share/utilities/globalDefinitions_xlc.hpp	2017-10-26 15:29:56.390108133 -0400
+++ new/src/hotspot/share/utilities/globalDefinitions_xlc.hpp	2017-10-26 15:29:56.036037192 -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