diff --git a/cmd/neofs-ir/defaults.go b/cmd/neofs-ir/defaults.go
index 398f56924..2d2368ac9 100644
--- a/cmd/neofs-ir/defaults.go
+++ b/cmd/neofs-ir/defaults.go
@@ -64,6 +64,7 @@ func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("contracts.container", "")
 	cfg.SetDefault("contracts.audit", "")
 	// alphabet contracts
+	cfg.SetDefault("contracts.alphabet.amount", 7)
 	cfg.SetDefault("contracts.alphabet.az", "")
 	cfg.SetDefault("contracts.alphabet.buky", "")
 	cfg.SetDefault("contracts.alphabet.vedi", "")