diff --git a/internal/tui/components/chat/messages/messages.go b/internal/tui/components/chat/messages/messages.go
index c3321ca18781312ed851ab2ece7b412609ba7281..718a055d6ac0b568efcc14d6974fa3a4557a21af 100644
--- a/internal/tui/components/chat/messages/messages.go
+++ b/internal/tui/components/chat/messages/messages.go
@@ -237,11 +237,14 @@ func (m *messageCmp) renderThinkingContent() string {
 	lines := strings.Split(reasoningContent.Thinking, "\n")
 	var content strings.Builder
 	lineStyle := t.S().Subtle.Background(t.BgBaseLighter)
-	for _, line := range lines {
+	for i, line := range lines {
 		if line == "" {
 			continue
 		}
-		content.WriteString(lineStyle.Width(m.textWidth()-2).Render(line) + "\n")
+		content.WriteString(lineStyle.Width(m.textWidth() - 2).Render(line))
+		if i < len(lines)-1 {
+			content.WriteString("\n")
+		}
 	}
 	fullContent := content.String()
 	height := util.Clamp(lipgloss.Height(fullContent), 1, 10)