diff --git a/sbin/newfs_msdos/mkfs_msdos.c b/sbin/newfs_msdos/mkfs_msdos.c
--- a/sbin/newfs_msdos/mkfs_msdos.c
+++ b/sbin/newfs_msdos/mkfs_msdos.c
@@ -568,14 +568,7 @@
 	    x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs;
 	}
 	if (set_res) {
-	    if (o.align)
-		alignto = bpb.bpbSecPerClust;
-	    else
-#ifdef	PAGE_SIZE
-		alignto = PAGE_SIZE / bpb.bpbBytesPerSec;
-#else
-	        alignto = 1;
-#endif
+	    alignto = bpb.bpbSecPerClust;
 	    if (alignto > 1) {
 		/* align data clusters */
 		alignment = (bpb.bpbResSectors + bpb.bpbBigFATsecs * bpb.bpbFATs + rds) %
diff --git a/sbin/newfs_msdos/newfs_msdos.8 b/sbin/newfs_msdos/newfs_msdos.8
--- a/sbin/newfs_msdos/newfs_msdos.8
+++ b/sbin/newfs_msdos/newfs_msdos.8
@@ -23,7 +23,7 @@
 .\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 .\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd June 2, 2024
+.Dd June 6, 2024
 .Dt NEWFS_MSDOS 8
 .Os
 .Sh NAME
@@ -91,13 +91,11 @@
 appended to the offset specifies that the
 number is in sectors, kilobytes, megabytes or gigabytes, respectively.
 .It Fl A
-Attempt to cluster align the data area, useful for SD card.
-If neither the
-.Fl A
-nor
+Attempt to cluster align the data area, useful for flash based storage.
+This option is enabled by default, unless a number of reserved sectors
+is specified using the
 .Fl r
-option is used, the number of reserved sectors is set to a value that aligns
-the start of the data area to a multiple of the page size of the host.
+option.
 .It Fl B Ar boot
 Get bootstrap from file.
 .It Fl C Ar create-size
@@ -173,12 +171,10 @@
 Number of hidden sectors.
 .It Fl r Ar reserved
 Number of reserved sectors.
-If neither the
-.Fl A
-nor
+If the
 .Fl r
-option is used, the number of reserved sectors is set to a value that aligns
-the start of the data area to a multiple of the page size of the host.
+option is not used, the number of reserved sectors is set to a value that
+aligns the start of the data area to a multiple of the cluster size.
 .It Fl s Ar total
 File system size.
 .It Fl u Ar track-size