diff --git a/tests/tmux.bats b/tests/tmux.bats
index 09e9899..14046ca 100644
--- a/tests/tmux.bats
+++ b/tests/tmux.bats
@@ -41,3 +41,7 @@ setup() {
 @test "tmux.conf pipes mouse-drag-end selection to system clipboard" {
     grep -qE "^bind -T copy-mode-vi MouseDragEnd1Pane .*copy-pipe-and-cancel .*xclip" "$CONFIG_FILE"
 }
+
+@test "tmux.conf enables truecolor passthrough for ghostty" {
+    grep -qE 'xterm-ghostty:Tc' "$CONFIG_FILE"
+}
diff --git a/tmux.conf b/tmux.conf
index fdfcd8c..61fb4fa 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -8,9 +8,9 @@ set -g history-limit 50000
 set -sg escape-time 10
 set -g focus-events on
 
-# True color (works in alacritty/kitty/wezterm/gnome-terminal)
+# True color (works in alacritty/kitty/wezterm/gnome-terminal/ghostty)
 set -g default-terminal "tmux-256color"
-set -ga terminal-overrides ",*256col*:Tc"
+set -ga terminal-overrides ",*256col*:Tc,xterm-ghostty:Tc"
 
 # Copy mode: vi keys (matches nvim/vim)
 setw -g mode-keys vi