diff --git a/cmd/tsgo/enablevtprocessing_windows.go b/cmd/tsgo/enablevtprocessing_windows.go
index d7197595db..249eba9572 100644
--- a/cmd/tsgo/enablevtprocessing_windows.go
+++ b/cmd/tsgo/enablevtprocessing_windows.go
@@ -5,12 +5,18 @@ import (
 )
 
 func enableVirtualTerminalProcessing() {
-	hStdout, err := windows.GetStdHandle(windows.STD_OUTPUT_HANDLE)
-	if err == nil && hStdout != windows.InvalidHandle {
+	h, err := windows.GetStdHandle(windows.STD_OUTPUT_HANDLE)
+	if err != nil || h == windows.InvalidHandle {
+		return
+	}
+	fileType, err := windows.GetFileType(h)
+	if err != nil || fileType == windows.FILE_TYPE_CHAR {
 		var mode uint32
-		err = windows.GetConsoleMode(windows.Handle(hStdout), &mode)
-		if err == nil {
-			windows.SetConsoleMode(windows.Handle(hStdout), mode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+		if err := windows.GetConsoleMode(h, &mode); err != nil {
+			return
+		}
+		if mode&windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING == 0 {
+			windows.SetConsoleMode(h, mode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
 		}
 	}
 }