diff --git a/generator/actions.ml b/generator/actions.ml
index d36eb0288..233590f59 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -10990,7 +10990,7 @@ be used on an ext2/3/4 or btrfs filesystem.
 The C<directory> parameter can be either a mountpoint, or a
 directory within the mountpoint.
 
-You also have to marked the partition as \"active\"
+You also have to mark the partition as \"active\"
 (C<guestfs_part_set_bootable>) and a Master Boot Record must
 be installed (eg. using C<guestfs_pwrite_device>) on the first
 sector of the whole disk.