diff --git a/contracts/main.tlb b/contracts/main.tlb
index 28bd773..12c10be 100644
--- a/contracts/main.tlb
+++ b/contracts/main.tlb
@@ -1,8 +1,9 @@
+// https://ton.org/docs/#/overviews/TL-B
 // base types defined in https://github.com/ton-blockchain/ton/blob/master/crypto/block/block.tlb
 
 // storage (according to save_data() contract method)
 
-storage#_ owner_address:MsgAddress counter:uint64
+storage#_ owner_address:MsgAddress counter:uint64 = Storage
 
 // ops