diff --git a/AppKit/CPResponder.j b/AppKit/CPResponder.j
index 32de1dfaa..99c9b0ab5 100644
--- a/AppKit/CPResponder.j
+++ b/AppKit/CPResponder.j
@@ -27,6 +27,7 @@ CPDeleteKeyCode     = 8;
 CPTabKeyCode        = 9;
 CPReturnKeyCode     = 13;
 CPEscapeKeyCode     = 27;
+CPSpaceKeyCode      = 32;
 CPLeftArrowKeyCode  = 37;
 CPUpArrowKeyCode    = 38;
 CPRightArrowKeyCode = 39;