diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 5334184a4..dfc7416a6 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.68 -
 ==================================
+  Improve dmsetup man page about readahead parameter.
   Use sysfs to set/get of read-ahead setting if possible.
   Fix lvm2-monitor init script to use normalized output when using vgs.
   Add test for max length (DM_MAX_TYPE_NAME) of target type name.
diff --git a/man/dmsetup.8.in b/man/dmsetup.8.in
index 351584844..f3e230c21 100644
--- a/man/dmsetup.8.in
+++ b/man/dmsetup.8.in
@@ -15,6 +15,8 @@ dmsetup \- low level logical volume management
 .RS
 .IR table_file ]
 .RB [{ \-\-addnodeoncreate | \-\-addnodeonresume }]
+.RB [ \-\-readahead
+.RI [ \+ ]< sectors >| auto | none ]
 .RE
 .br
 .B dmsetup deps
@@ -85,6 +87,10 @@ dmsetup \- low level logical volume management
 .B dmsetup resume
 .I device_name
 .RB [{ \-\-addnodeoncreate | \-\-addnodeonresume }]
+.RS
+.RB [ \-\-readahead
+.RI [ \+ ]< sectors >| auto | none ]
+.RE
 .br
 .B dmsetup setgeometry
 .I device_name cyl head sect start
@@ -202,11 +208,11 @@ Specify which fields to display.
 .TP
 .IR \fB\-\-readahead \ [ \+ ]< sectors >| auto | none
 Specify read ahead size in units of sectors.
-The default value is "auto" which allows the kernel to choose
-a suitable value automatically.  The + prefix lets you
+The default value is \fIauto\fP which allows the kernel to choose
+a suitable value automatically.  The \fI\+\fP prefix lets you
 specify a minimum value which will not be used if it is
 smaller than the value chosen by the kernel.
-"None" is equivalent to specifying zero.
+The value \fInone\fP is equivalent to specifying zero.
 .TP
 .BR \-r | \-\-readonly
 Set the table being loaded read-only.
@@ -248,6 +254,8 @@ Destroys the table in the inactive table slot for device_name.
 .RB [ \-\-notable | \-\-table
 .RI < \fItable >| table_file ]
 .RB [{ \-\-addnodeoncreate | \-\-addnodeonresume }]
+.RB [ \-\-readahead
+.RI [ + ]< sectors >| auto | none ]
 .br
 Creates a device with the given name.
 If table_file or <table> is supplied, the table is loaded and made live.
@@ -402,6 +410,8 @@ After a uuid has been set it cannot be changed.
 .B resume
 .I device_name
 .RB [{ \-\-addnodeoncreate | \-\-addnodeonresume }]
+.RB [ \-\-readahead
+.RI [ + ]< sectors >| auto | none ]
 .br
 Un-suspends a device.
 If an inactive table has been loaded, it becomes live.