diff --git a/litsupport/modules/hash.py b/litsupport/modules/hash.py
index 7cabc56..97b8915 100644
--- a/litsupport/modules/hash.py
+++ b/litsupport/modules/hash.py
@@ -10,8 +10,8 @@
         return
     executable = context.executable
     try:
-        # Darwin's and Solaris' "strip" don't support these arguments.
-        if platform.system() != "Darwin" and platform.system() != "SunOS":
+        # AIX, z/OS, and Darwin's and Solaris' "strip" don't support these arguments.
+        if platform.system() != 'OS/390' and platform.system() != 'AIX' and platform.system() != "Darwin" and platform.system() != "SunOS":
             stripped_executable = executable + ".stripped"
             testplan.check_call(
                 [