diff --git a/manifests/setup.pp b/manifests/setup.pp
index 1a6af6487..f04f2d7f5 100644
--- a/manifests/setup.pp
+++ b/manifests/setup.pp
@@ -31,8 +31,8 @@
   # this goes smoothly, we should move towards completely eliminating the .sh
   # version.
   $script_name = $::osfamily? {
-    /(?i:(Windows|Solaris))/ => 'concatfragments.rb',
-    default                  => 'concatfragments.sh'
+    /(?i:(Windows|Solaris|AIX))/ => 'concatfragments.rb',
+    default                      => 'concatfragments.sh'
   }
 
   $script_path = "${concatdir}/bin/${script_name}"