diff --git a/config/tmux/tmux.conf b/config/tmux/tmux.conf
index 9ed2f55..303d788 100644
--- a/config/tmux/tmux.conf
+++ b/config/tmux/tmux.conf
@@ -71,6 +71,9 @@ setw -g  automatic-rename   on      # automatically rename windows
 setw -g  mouse              on      # enable mouse support
 setw -g  pane-base-index    1       # start pane numbering from 1
 
+# Start non-login shells for new panes/windows.
+# https://wiki.archlinux.org/title/Tmux#Start_a_non-login_shell
+set -g default-command "${SHELL}"
 
 # Set $TERM, force 256 colors, and enable italics.
 # https://github.com/tmux/tmux/wiki/FAQ#how-do-i-use-a-256-colour-terminal