tools/lvconvert.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index aa2dca7..757b323 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -3104,8 +3104,9 @@ static int _lvconvert_to_pool(struct cmd_context *cmd,
 			return 0;
 		}
 
-		/* FIXME Tidy up all these type restrictions. */
+		/* FIXME Tidy up all these type restrictions. (Use a type whitelist?) */
 		if (lv_is_cache_type(metadata_lv) ||
+		    lv_is_writecache(metadata_lv) ||
 		    lv_is_thin_type(metadata_lv) ||
 		    lv_is_cow(metadata_lv) || lv_is_merging_cow(metadata_lv) ||
 		    lv_is_origin(metadata_lv) || lv_is_merging_origin(metadata_lv) ||