--- a/primitives/data-structs/src/lib.rs
+++ b/primitives/data-structs/src/lib.rs
@@ -76,6 +76,7 @@
 
 // Schema limits
 pub const OFFCHAIN_SCHEMA_LIMIT: u32 = 8192;
+pub const VARIABLE_ON_CHAIN_SCHEMA_LIMIT: u32 = 8192;
 pub const CONST_ON_CHAIN_SCHEMA_LIMIT: u32 = 32768;
 
 pub const COLLECTION_FIELD_LIMIT: u32 = CONST_ON_CHAIN_SCHEMA_LIMIT;
@@ -302,6 +303,9 @@
 	pub limits: CollectionLimitsVersion2,
 
 	#[version(..2)]
+	pub variable_on_chain_schema: BoundedVec<u8, ConstU32<VARIABLE_ON_CHAIN_SCHEMA_LIMIT>>,
+
+	#[version(..2)]
 	pub const_on_chain_schema: BoundedVec<u8, ConstU32<CONST_ON_CHAIN_SCHEMA_LIMIT>>,
 
 	pub meta_update_permission: MetaUpdatePermission,