1diff --git a/plugins/virtualenvwrapper/virtualenvwrapper.plugin.zsh b/plugins/virtualenvwrapper/virtualenvwrapper.plugin.zsh
2index 0ad33691743d993b5cdee7b8b0b46528e6afb31f..5faa1a823aa7c9764aef2eb95aed5fa16a5e3bb4 100644
3--- a/plugins/virtualenvwrapper/virtualenvwrapper.plugin.zsh
4+++ b/plugins/virtualenvwrapper/virtualenvwrapper.plugin.zsh
5@@ -64,12 +64,7 @@ if [[ ! $DISABLE_VENV_CD -eq 1 ]]; then
6 7 # Append workon_cwd to the chpwd_functions array, so it will be called on cd
8 # http://zsh.sourceforge.net/Doc/Release/Functions.html
9- # TODO: replace with 'add-zsh-hook chpwd workon_cwd' when oh-my-zsh min version is raised above 4.3.4
10- if (( ${+chpwd_functions} )); then
11- if (( $chpwd_functions[(I)workon_cwd] == 0 )); then
12- set -A chpwd_functions $chpwd_functions workon_cwd
13- fi
14- else
15- set -A chpwd_functions workon_cwd
16+ if ! (( $chpwd_functions[(I)workon_cwd] )); then
17+ chpwd_functions+=(workon_cwd)
18 fi
19 fi