diff --git a/setup/etc/profile.d/03-startup.sh b/setup/etc/profile.d/03-startup.sh
index fd2104e..29ac0b9 100755
--- a/setup/etc/profile.d/03-startup.sh
+++ b/setup/etc/profile.d/03-startup.sh
@@ -1,5 +1,6 @@
 # this runs startups for bash shell base system
-  if  [ "$SHELL" = "/bin/bash" ] && [ "${BASH_SHELL_STARTUP}" ]; then
+ # don't run statup if user logs in via su
+  if  [ "$SHELL" = "/bin/bash" ] && [ "${BASH_SHELL_STARTUP}" ] && [ "$(ps -o comm= $PPID)" != "su" ]; then
     # uncomment for debugging
     if [[ -f $BASH_SHELL_STARTUP ]] && [[ $EUID -ne 0 ]]; then
      llog "running startup script $BASH_SHELL_STARTUP async"