diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index fc58add31..e428ce0fc 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -157,6 +157,7 @@ static int _read_params(struct lvconvert_params *lp, struct cmd_context *cmd,
 	int pagesize = lvm_getpagesize();
 
 	memset(lp, 0, sizeof(*lp));
+	lp->target_attr = ~0;
 
 	if ((arg_count(cmd, snapshot_ARG) || arg_count(cmd, merge_ARG)) &&
 	    (arg_count(cmd, mirrorlog_ARG) || arg_count(cmd, mirrors_ARG) ||
diff --git a/tools/lvcreate.c b/tools/lvcreate.c
index 0d76bbe9d..78292f74f 100644
--- a/tools/lvcreate.c
+++ b/tools/lvcreate.c
@@ -659,6 +659,7 @@ static int _lvcreate_params(struct lvcreate_params *lp,
 	memset(lp, 0, sizeof(*lp));
 	memset(lcp, 0, sizeof(*lcp));
 	dm_list_init(&lp->tags);
+	lp->target_attr = ~0;
 
 	/*
 	 * Check selected options are compatible and determine segtype