diff --git a/disk-utils/cfdisk.8 b/disk-utils/cfdisk.8
index dcceef13a..20c021eea 100644
--- a/disk-utils/cfdisk.8
+++ b/disk-utils/cfdisk.8
@@ -118,6 +118,15 @@ MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB
 Quit the program.  This will exit the program without writing any data to
 the disk.
 .TP
+.B r
+Reduce or enlarge the current partition.
+.B cfdisk
+then prompts you for the new size of the partition.
+The default size is the current size.
+A partition marked as free space or marked as unusable cannot be resized.
+
+Note that reducing the size of a partition might destroy data on that partition.
+.TP
 .B s
 Sort the partitions in ascending start-sector order.  When deleting and
 adding partitions, it is likely that the numbering of the partitions will
diff --git a/disk-utils/cfdisk.c b/disk-utils/cfdisk.c
index 74f3322c8..5ae21e73a 100644
--- a/disk-utils/cfdisk.c
+++ b/disk-utils/cfdisk.c
@@ -2209,6 +2209,7 @@ static int ui_help(void)
 		N_("  h          Print this screen"),
 		N_("  n          Create new partition from free space"),
 		N_("  q          Quit program without writing partition table"),
+		N_("  r          Reduce or enlarge the current partition"),
 		N_("  s          Fix partitions order (only when in disarray)"),
 		N_("  t          Change the partition type"),
 		N_("  u          Dump disk layout to sfdisk compatible script file"),