diff --git a/WHATS_NEW b/WHATS_NEW
index b1f8410fc..1bdb88408 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.112 - 
 =====================================
+  Mark pools and snapshots as unzeroable volumes.
   Check for zeroing of volume after segment type is fully detected.
   Better support for persistent major and minor options with lvcreate.
   Refactor lvcreate towards more complete validation of all supported options.
diff --git a/lib/cache_segtype/cache.c b/lib/cache_segtype/cache.c
index 99276883a..8c2ff7808 100644
--- a/lib/cache_segtype/cache.c
+++ b/lib/cache_segtype/cache.c
@@ -391,7 +391,7 @@ int init_cache_segtypes(struct cmd_context *cmd,
 	segtype->cmd = cmd;
 
 	segtype->name = "cache-pool";
-	segtype->flags = SEG_CACHE_POOL;
+	segtype->flags = SEG_CACHE_POOL | SEG_CANNOT_BE_ZEROED;
 	segtype->ops = &_cache_pool_ops;
 	segtype->private = NULL;
 
diff --git a/lib/snapshot/snapshot.c b/lib/snapshot/snapshot.c
index 18e811172..aefab3ac9 100644
--- a/lib/snapshot/snapshot.c
+++ b/lib/snapshot/snapshot.c
@@ -262,7 +262,7 @@ struct segment_type *init_segtype(struct cmd_context *cmd)
 	segtype->ops = &_snapshot_ops;
 	segtype->name = "snapshot";
 	segtype->private = NULL;
-	segtype->flags = SEG_SNAPSHOT;
+	segtype->flags = SEG_SNAPSHOT | SEG_CANNOT_BE_ZEROED;
 
 #ifdef DEVMAPPER_SUPPORT
 #  ifdef DMEVENTD
diff --git a/lib/thin/thin.c b/lib/thin/thin.c
index 9ae237e15..bb13b2b3d 100644
--- a/lib/thin/thin.c
+++ b/lib/thin/thin.c
@@ -753,7 +753,7 @@ int init_multiple_segtypes(struct cmd_context *cmd, struct segtype_library *segl
 		const char name[16];
 		uint32_t flags;
 	} reg_segtypes[] = {
-		{ &_thin_pool_ops, "thin-pool", SEG_THIN_POOL },
+		{ &_thin_pool_ops, "thin-pool", SEG_THIN_POOL | SEG_CANNOT_BE_ZEROED },
 		/* FIXME Maybe use SEG_THIN_VOLUME instead of SEG_VIRTUAL */
 		{ &_thin_ops, "thin", SEG_THIN_VOLUME | SEG_VIRTUAL }
 	};