diff --git a/lib/libc/sys/aio_suspend.2 b/lib/libc/sys/aio_suspend.2
index be6d7e1bbbb9..b92e6866e8a4 100644
--- a/lib/libc/sys/aio_suspend.2
+++ b/lib/libc/sys/aio_suspend.2
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd Oct 23, 2017
+.Dd October 23, 2017
 .Dt AIO_SUSPEND 2
 .Os
 .Sh NAME