1 files changed, 7 insertions, 0 deletions
diff --git a/zsh/zshrc b/zsh/zshrc
index 2376e568..6edcdb67 100644
--- a/zsh/zshrc
+++ b/zsh/zshrc
@@ -7,6 +7,13 @@ HISTFILE=$HOME/.zsh_history
 SAVEHIST=$((1 << 12))
 HISTSIZE=$((1 << 10))
 
+# Set a SHLVL-derived value that takes tmux into account. This is used to show
+# the current SHLVL in the prompt
+if [[ -n $TMUX && -z $TMUX_SHLVL ]] ; then
+    TMUX_SHLVL=$((SHLVL - 1))
+    export TMUX_SHLVL
+fi
+
 # Load POSIX shell startup files and then Bash-specific ones
 for sh in "$ENV" "$HOME"/.zshrc.d/*.zsh ; do
     [[ -e $sh ]] && source "$sh"