diff --git a/lib/libc/stdtime/time2posix.3 b/lib/libc/stdtime/time2posix.3
index 38bb1ab846d..21b9438c1f3 100644
--- a/lib/libc/stdtime/time2posix.3
+++ b/lib/libc/stdtime/time2posix.3
@@ -40,7 +40,7 @@ passed-to functions such as
 and
 .Xr difftime 3 .
 However,
-.Std -p1003.1-88
+.St -p1003.1-88
 gives an arithmetic
 expression for directly computing a time_t value from a given date/time,
 and the same relationship is assumed by some