diff --git a/lib/libc/sys/mmap.2 b/lib/libc/sys/mmap.2
index 845ba94b297..b02fec03da6 100644
--- a/lib/libc/sys/mmap.2
+++ b/lib/libc/sys/mmap.2
@@ -173,7 +173,7 @@ The
 .Xr fsync 2
 function will flush all dirty data and metadata associated with a file,
 including dirty NOSYNC VM data, to physical media.  The
-.Xr sync 1
+.Xr sync 8
 command and
 .Xr sync 2
 system call generally do not flush dirty NOSYNC VM data.