diff --git a/README.md b/README.md
index 7012263..bdb4d30 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,11 @@ view:
   # Default: adaptive
   colour: adaptive
 
+  # Terminal compatibility.
+  # Values: default, ttyd
+  # Default: default
+  compatibility: default
+
 commit:
   # Emoji format in commit.
   # Values: shortcode, character
diff --git a/internal/ui/header/emoji.go b/internal/ui/header/emoji.go
index f5b529d..63c9928 100644
--- a/internal/ui/header/emoji.go
+++ b/internal/ui/header/emoji.go
@@ -2,20 +2,17 @@ package header
 
 import (
 	"fmt"
-	"os"
 
 	"github.com/charmbracelet/bubbles/list"
 	"github.com/mattn/go-runewidth"
+	"github.com/mikelorant/committed/internal/config"
 	"github.com/mikelorant/committed/internal/emoji"
 	"github.com/mikelorant/committed/internal/fuzzy"
 )
 
-const (
-	ttydTerminal = "ttyd"
-)
-
 type listItem struct {
-	emoji emoji.Emoji
+	emoji         emoji.Emoji
+	compatibility config.Compatibility
 }
 
 type fuzzyItem struct {
@@ -25,8 +22,8 @@ type fuzzyItem struct {
 func (i listItem) Title() string {
 	var space string
 
-	switch os.Getenv("COMMITTED_TERMINAL") {
-	case ttydTerminal:
+	switch i.compatibility {
+	case config.CompatibilityTtyd:
 		space = " "
 	default:
 		if runewidth.StringWidth(i.emoji.Character) == 1 {
@@ -51,11 +48,20 @@ func (i fuzzyItem) Terms() []string {
 	}
 }
 
-func castToListItems(emojis []emoji.Emoji) []list.Item {
+func WithCompatibility(c config.Compatibility) func(*listItem) {
+	return func(i *listItem) {
+		i.compatibility = c
+	}
+}
+
+func castToListItems(emojis []emoji.Emoji, opts ...func(*listItem)) []list.Item {
 	res := make([]list.Item, len(emojis))
 	for i, e := range emojis {
 		var item listItem
 		item.emoji = e
+		for _, o := range opts {
+			o(&item)
+		}
 		res[i] = item
 	}
 
diff --git a/internal/ui/header/header.go b/internal/ui/header/header.go
index 0b50166..e0e31cc 100644
--- a/internal/ui/header/header.go
+++ b/internal/ui/header/header.go
@@ -58,7 +58,7 @@ func New(state *commit.State) Model {
 		styles:        defaultStyles(state.Theme),
 		summaryInput:  summaryInput(state),
 		filterList: filterlist.New(
-			castToListItems(state.Emojis.Emojis),
+			castToListItems(state.Emojis.Emojis, WithCompatibility(state.Config.View.Compatibility)),
 			filterPromptText,
 			filterHeight,
 			state,
@@ -136,7 +136,8 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 		items := make([]list.Item, len(ranks))
 		for i, rank := range ranks {
-			items[i] = castToListItems(m.Emojis)[rank]
+			compat := WithCompatibility(m.state.Config.View.Compatibility)
+			items[i] = castToListItems(m.Emojis, compat)[rank]
 		}
 		m.filterList.SetItems(items)
 	}
diff --git a/internal/ui/header/header_test.go b/internal/ui/header/header_test.go
index 2d186ea..b4cf85c 100644
--- a/internal/ui/header/header_test.go
+++ b/internal/ui/header/header_test.go
@@ -17,7 +17,6 @@ import (
 
 func TestModel(t *testing.T) {
 	type args struct {
-		env   map[string]string
 		state func(c *commit.State)
 		model func(m header.Model) header.Model
 	}
@@ -174,14 +173,12 @@ func TestModel(t *testing.T) {
 			},
 		},
 		{
-			name: "expand_emojis_env",
+			name: "expand_emojis_ttyd",
 			args: args{
-				env: map[string]string{
-					"COMMITTED_TERMINAL": "ttyd",
-				},
 				state: func(c *commit.State) {
 					c.Emojis = emoji.New()
 					c.Repository.Head.Message = "summary\n\nbody"
+					c.Config.View.Compatibility = config.CompatibilityTtyd
 				},
 				model: func(m header.Model) header.Model {
 					m.Focus()
@@ -762,10 +759,6 @@ func TestModel(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			for k, v := range tt.args.env {
-				t.Setenv(k, v)
-			}
-
 			c := testState()
 			if tt.args.state != nil {
 				tt.args.state(&c)
diff --git a/internal/ui/header/testdata/expand_emojis_env.golden b/internal/ui/header/testdata/expand_emojis_ttyd.golden
similarity index 100%
rename from internal/ui/header/testdata/expand_emojis_env.golden
rename to internal/ui/header/testdata/expand_emojis_ttyd.golden