diff --git a/src/tcurses.py b/src/tcurses.py
index 6a3b27e..73811b2 100644
--- a/src/tcurses.py
+++ b/src/tcurses.py
@@ -228,6 +228,14 @@ def clear(self) -> None:
                 " " * self.width,
             )
 
+    def keypad(self, flag: bool) -> None:
+        """
+        If flag is True, enable keypad mode.
+        If flag is False, disable keypad mode.
+        """
+        _ = flag
+        raise NotImplementedError("tcurses keypad")
+
 
 ERR = -1
 OK = 0