diff --git a/hotspot/src/share/vm/opto/superword.hpp b/hotspot/src/share/vm/opto/superword.hpp
index 056baad1f52..95f2df75721 100644
--- a/hotspot/src/share/vm/opto/superword.hpp
+++ b/hotspot/src/share/vm/opto/superword.hpp
@@ -31,6 +31,10 @@
 #include "opto/vectornode.hpp"
 #include "utilities/growableArray.hpp"
 
+#ifdef AIX
+#include "cstdlib"
+#endif
+
 //
 //                  S U P E R W O R D   T R A N S F O R M
 //