diff --git a/v3/termutil/term_aix.go b/v3/termutil/term_aix.go
new file mode 100644
index 0000000..5bbc5ef
--- /dev/null
+++ b/v3/termutil/term_aix.go
@@ -0,0 +1,69 @@
+//go:build aix
+
+package termutil
+
+import (
+	"os"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+var (
+	tty *os.File
+
+	unlockSignals = []os.Signal{
+		os.Interrupt, syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGKILL,
+	}
+)
+
+func init() {
+	var err error
+	tty, err = os.Open("/dev/tty")
+	if err != nil {
+		tty = os.Stdin
+	}
+}
+
+// TerminalWidth returns width of the terminal.
+func TerminalWidth() (int, error) {
+	_, width, err := TerminalSize()
+	return width, err
+}
+
+// TerminalSize returns size of the terminal.
+func TerminalSize() (int, int, error) {
+	w, err := unix.IoctlGetWinsize(int(tty.Fd()), syscall.TIOCGWINSZ)
+	if err != nil {
+		return 0, 0, err
+	}
+	return int(w.Row), int(w.Col), nil
+}
+
+var oldState unix.Termios
+
+func lockEcho() error {
+	fd := int(tty.Fd())
+	currentState, err := unix.IoctlGetTermios(fd, unix.TCGETS)
+	if err != nil {
+		return err
+	}
+
+	oldState = *currentState
+	newState := oldState
+	newState.Lflag &^= syscall.ECHO
+	newState.Lflag |= syscall.ICANON | syscall.ISIG
+	newState.Iflag |= syscall.ICRNL
+	if err := unix.IoctlSetTermios(fd, unix.TCSETS, &newState); err != nil {
+		return err
+	}
+	return nil
+}
+
+func unlockEcho() (err error) {
+	fd := int(tty.Fd())
+	if err := unix.IoctlSetTermios(fd, unix.TCSETS, &oldState); err != nil {
+		return err
+	}
+	return
+}