diff --git a/functions.sh b/functions.sh
index f8d44a8..9385973 100755
--- a/functions.sh
+++ b/functions.sh
@@ -959,16 +959,15 @@ loadagent() {
     [ -n "${af:+x}" ] && eval $(<$af)
     if which tmux 1>/dev/null 2>&1 
     then
-        [ -n "${SSH_AUTH_SOCK:-}" ] && tmux set-environment SSH_AUTH_SOCK $SSH_AUTH_SOCK
-        [ -n "${SSH_AGENT_PID:-}" ] && tmux set-environment SSH_AGENT_PID $SSH_AGENT_PID
-        [ -n "${PKCS11_MODULE:-}" ] && tmux set-environment PKCS11_MODULE $PKCS11_MODULE
+        [ -n "${SSH_AUTH_SOCK:-}" ] && tmux set-environment SSH_AUTH_SOCK $SSH_AUTH_SOCK || tmux set-environment -r SSH_AUTH_SOCK
+        [ -n "${SSH_AGENT_PID:-}" ] && tmux set-environment SSH_AGENT_PID $SSH_AGENT_PID || tmux set-environment -r SSH_AGENT_PID
+        [ -n "${PKCS11_MODULE:-}" ] && tmux set-environment PKCS11_MODULE $PKCS11_MODULE || tmux set-environment -r PKCS11_MODULE
     fi
     logdebug "SSH_AUTH_SOCK: ${SSH_AUTH_SOCK-not set}"
     logdebug "SSH_AGENT_PID: ${SSH_AGENT_PID-not set}"
     logdebug "PCKS11_MODULE: ${PCKS11_MODULE-not set}"
     loginfo "currently loaded keys in agent:
 $(ssh-add -l)"
-#    export P11M=$PKCS11_MODULE
 
     EXIT
 }