diff --git a/lib/libc/sys/msync.2 b/lib/libc/sys/msync.2
index 7a86cd414070..24e33e8cb6c5 100644
--- a/lib/libc/sys/msync.2
+++ b/lib/libc/sys/msync.2
@@ -65,7 +65,7 @@ The
 .Fa flags
 argument may be specified as follows:
 .Bd -literal
-MS_ASYNC	Return immediately (not currently implemented)
+MS_ASYNC	Return immediately
 MS_SYNC		Perform synchronous writes
 MS_INVALIDATE	Invalidate all cached data
 .Ed