diff --git a/x/cosmostest/types/genesis.go b/x/cosmostest/types/genesis.go
index c6d005b..41d6e1b 100644
--- a/x/cosmostest/types/genesis.go
+++ b/x/cosmostest/types/genesis.go
@@ -10,7 +10,7 @@ const DefaultIndex uint64 = 1
 // DefaultGenesis returns the default Capability genesis state
 func DefaultGenesis() *GenesisState {
 	return &GenesisState{
-		NextAuction: nil,
+		NextAuction: &NextAuction{AuctionId: 0},
 		AuctionList: []Auction{},
 		// this line is used by starport scaffolding # genesis/types/default
 		Params: DefaultParams(),