diff --git a/stand/lua/core.lua.8 b/stand/lua/core.lua.8
index 3b8c34ceefbb..c5ec1251627f 100644
--- a/stand/lua/core.lua.8
+++ b/stand/lua/core.lua.8
@@ -65,6 +65,8 @@ The following key-string constants are defined in
 .Bl -tag -width KEYSTR_ESCAPE -compact -offset indent
 .It Ic KEYSTR_ESCAPE
 The escape key.
+.It Ic KEYSTR_CSI
+The ANSI CSI sequence.
 .El
 .Pp
 The following menu entry type constants are defined in