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-rw-r--r--lib/libc/string/swab.32
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/libc/string/swab.3 b/lib/libc/string/swab.3
index 13be3eb..7efc22f 100644
--- a/lib/libc/string/swab.3
+++ b/lib/libc/string/swab.3
@@ -55,7 +55,7 @@ swapping adjacent bytes.
.Pp
The argument
.Fa len
-must be even number.
+must be an even number.
.Sh SEE ALSO
.Xr bzero 3 ,
.Xr memset 3
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