diff --git a/super-ddf.c b/super-ddf.c
index 11a3bac..7cc5ac6 100644
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -2651,6 +2651,8 @@ validate_geometry_ddf_container(struct supertype *st,
 	close(fd);
 
 	*freesize = avail_size_ddf(st, ldsize >> 9);
+	if (*freesize == 0)
+		return 0;
 
 	return 1;
 }