diff --git a/powerline/bindings/tmux/powerline.conf b/powerline/bindings/tmux/powerline.conf
index fe16319a..b9ef0375 100644
--- a/powerline/bindings/tmux/powerline.conf
+++ b/powerline/bindings/tmux/powerline.conf
@@ -1,4 +1,2 @@
-if-shell 'test -z "$POWERLINE_CONFIG_COMMAND"' 'set-environment -g POWERLINE_CONFIG_COMMAND powerline-config'
-
-run-shell 'eval $POWERLINE_CONFIG_COMMAND tmux setup'
+if-shell 'test -z "$POWERLINE_CONFIG_COMMAND"' 'set-environment -g POWERLINE_CONFIG_COMMAND powerline-config; run-shell "eval \$POWERLINE_CONFIG_COMMAND tmux setup"' 'run-shell "eval \$POWERLINE_CONFIG_COMMAND tmux setup"'
 # vim: ft=tmux