diff --git a/src/main/python/keycodes.py b/src/main/python/keycodes.py
index 2a3db70..a09c822 100644
--- a/src/main/python/keycodes.py
+++ b/src/main/python/keycodes.py
@@ -302,6 +302,7 @@ KEYCODES_QUANTUM = [
     K(QK_LCTL|QK_LALT|QK_LGUI, "LCAG(kc)", "LCAG\n(kc)", "LCTL + LALT + LGUI", masked=True),
     K(QK_LGUI|QK_LSFT, "SGUI(kc)", "SGUI\n(kc)", "LGUI + LSFT", masked=True),
     K(QK_LCTL|QK_LALT, "LCA(kc)", "LCA\n(kc)", "LCTL + LALT", masked=True),
+    K(QK_LCTL|QK_LSFT, "C_S(kc)", "C_S\n(kc)", "LCTL + LSFT", masked=True),
 
     K(0x5C16, "KC_GESC", "~\nEsc", "Esc normally, but ~ when Shift or GUI is pressed"),
     K(0x5CD7, "KC_LSPO", "LS\n(", "Left Shift when held, ( when tapped"),