diff --git a/jdk/test/com/sun/jdi/ShellScaffold.sh b/jdk/test/com/sun/jdi/ShellScaffold.sh
index 0ca14814e6c..855ba8ba092 100644
--- a/jdk/test/com/sun/jdi/ShellScaffold.sh
+++ b/jdk/test/com/sun/jdi/ShellScaffold.sh
@@ -307,7 +307,7 @@ EOF
              #The alternative would be to use /usr/bin/pargs [pid] to get
              #all the args for a process, splice them back into one
              #long string, then grep.
-             UU=`/usr/bin/id -un`
+             UU=`/usr/xpg4/bin/id -u -n`
              psCmd="pgrep -f -l -U $UU"
          else
              ulimit -c 0