diff --git a/gen-wcwidth.py b/gen-wcwidth.py
index 1bfe93517..ca098f8ad 100755
--- a/gen-wcwidth.py
+++ b/gen-wcwidth.py
@@ -230,7 +230,7 @@ def parse_eaw() -> None:
         if eaw == 'A':
             ambiguous |= chars
             seen |= chars
-        elif eaw == 'W' or eaw == 'F':
+        elif eaw in ('W', 'F'):
             doublewidth |= chars
             seen |= chars
     doublewidth |= set(range(0x3400, 0x4DBF + 1)) - seen