diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..44cb975
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*~
+sync.sh
diff --git a/tty.js b/tty.js
index d5d0501..1a5bfb0 100644
--- a/tty.js
+++ b/tty.js
@@ -675,7 +675,7 @@ function TTY(screenElement, keyboardElement, bell) {
       case '7':
       case '8':
       case '9':
-        if (e.location === KeyboardEvent.DOM_KEY_LOCATION_NUMPAD) {
+        if (e.keyLocation === KeyboardEvent.DOM_KEY_LOCATION_NUMPAD) {
           // Numpad, presumably - allow but nothing special
           return ord(e.keyName);
         } else if (e.ctrlKey) {