diff --git a/WHATS_NEW b/WHATS_NEW
index 893f9c3aa..3648fcaa5 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.95 -
 ================================
+  Use 64bit math for verification of thin pool and snapshot chunk size.
   Validate udev structures in _insert_udev_dir().
   Scan all devices for lvmetad if 'pvscan --cache' used without device list.
   Populate lvmcache from lvmetad before displaying PVs in pvscan. (2.02.94)
diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c
index af9d109f4..31d6ad442 100644
--- a/lib/metadata/lv_manip.c
+++ b/lib/metadata/lv_manip.c
@@ -4239,12 +4239,12 @@ static struct logical_volume *_lv_create_an_lv(struct volume_group *vg, struct l
 	}
 
 	if (seg_is_thin_pool(lp) &&
-	    (lp->extents * vg->extent_size < lp->chunk_size)) {
+	    ((uint64_t)lp->extents * vg->extent_size < lp->chunk_size)) {
 		log_error("Unable to create thin pool smaller than 1 chunk.");
 		return NULL;
 	}
 
-	if (lp->snapshot && !lp->thin && (lp->extents * vg->extent_size < 2 * lp->chunk_size)) {
+	if (lp->snapshot && !lp->thin && ((uint64_t)lp->extents * vg->extent_size < 2 * lp->chunk_size)) {
 		log_error("Unable to create a snapshot smaller than 2 chunks.");
 		return NULL;
 	}