diff --git a/kitty/typing.pyi b/kitty/typing.pyi
index 59b45966e..90ec41515 100644
--- a/kitty/typing.pyi
+++ b/kitty/typing.pyi
@@ -46,7 +46,7 @@ PowerlineStyle = Literal['angled', 'slanted', 'round']
 GRT_a = Literal['t', 'T', 'q', 'p', 'd', 'f', 'a', 'c']
 GRT_f = Literal[24, 32, 100]
 GRT_t = Literal['d', 'f', 't', 's']
-GRT_o = Literal['z']
+GRT_o = Literal['z', 'z']  # two z's to workaround a bug in ruff
 GRT_m = Literal[0, 1]
 GRT_C = Literal[0, 1]
 GRT_d = Literal['a', 'A', 'c', 'C', 'i', 'I', 'p', 'P', 'q', 'Q', 'x', 'X', 'y', 'Y', 'z', 'Z', 'f', 'F']