diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 11fb24701..376fee9d3 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -1213,6 +1213,7 @@ int lv_is_raid_with_tracking(const struct logical_volume *lv);
 uint32_t lv_raid_image_count(const struct logical_volume *lv);
 int lv_raid_change_image_count(struct logical_volume *lv,
 			       uint32_t new_count,
+			       uint32_t new_region_size,
 			       struct dm_list *allocate_pvs);
 int lv_raid_split(struct logical_volume *lv, const char *split_name,
 		  uint32_t new_count, struct dm_list *splittable_pvs);
diff --git a/lib/metadata/raid_manip.c b/lib/metadata/raid_manip.c
index e21e6cc10..ab0bfab3d 100644
--- a/lib/metadata/raid_manip.c
+++ b/lib/metadata/raid_manip.c
@@ -2866,11 +2866,11 @@ static int _raid_extract_images(struct logical_volume *lv,
 					  display_lvname(lv),
 					  display_lvname(seg_lv(seg, s)));
 
-				log_error("Try removing the PV list and rerun"
+				log_error("Try removing the PV list and rerun."
 					  " the command.");
 				return 0;
 			}
-			log_debug("LVs with error segments to be removed: %s %s.",
+			log_debug("LVs with error segments to be removed: %s %s",
 				  display_lvname(seg_metalv(seg, s)),
 				  display_lvname(seg_lv(seg, s)));
 		} else {
@@ -3013,8 +3013,15 @@ static int _lv_raid_change_image_count(struct logical_volume *lv, uint32_t new_c
 }
 
 int lv_raid_change_image_count(struct logical_volume *lv, uint32_t new_count,
-			       struct dm_list *allocate_pvs)
+			       const uint32_t new_region_size, struct dm_list *allocate_pvs)
 {
+	struct lv_segment *seg = first_seg(lv);
+
+	if (new_region_size) {
+		seg->region_size = new_region_size;
+		_check_and_adjust_region_size(lv);
+	}
+
 	return _lv_raid_change_image_count(lv, new_count, allocate_pvs, NULL, 1, 0);
 }
 
diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index abec04a7e..0db10cbd9 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -1359,7 +1359,7 @@ static int _lvconvert_raid(struct logical_volume *lv, struct lvconvert_params *l
 					  DEFAULT_RAID1_MAX_IMAGES, lp->segtype->name, display_lvname(lv));
 				return 0;
 			}
-			if (!lv_raid_change_image_count(lv, image_count, /* lp->region_size, */ lp->pvh))
+			if (!lv_raid_change_image_count(lv, image_count, lp->region_size, lp->pvh))
 				return_0;
 
 			log_print_unless_silent("Logical volume %s successfully converted.",