---
 tools/lvconvert.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: LVM2.2.02.85/tools/lvconvert.c
===================================================================
--- LVM2.2.02.85.orig/tools/lvconvert.c	2011-05-23 15:59:19.000000000 +0200
+++ LVM2.2.02.85/tools/lvconvert.c	2011-05-23 16:00:15.000000000 +0200
@@ -1557,7 +1557,7 @@ static int _lvconvert_single(struct cmd_
 	}
 
 	if (lp->merge) {
-		if (!lv_is_cow(lv)) {
+		if (!lv_is_cow(lv) || lv->snapshot->status & SNAPSHOT_SHARED) {
 			log_error("Logical volume \"%s\" is not a snapshot",
 				  lv->name);
 			return ECMD_FAILED;