fix vc compatibility (#1091)

cdevelop

2023-11-15 397f4d4b7a9c7b35fa57b1358f076ed0dd718257

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.