diff --git a/runtime/kusama/src/lib.rs b/runtime/kusama/src/lib.rs
index 7b19200dcefc..1187bf8e1bf3 100644
--- a/runtime/kusama/src/lib.rs
+++ b/runtime/kusama/src/lib.rs
@@ -637,6 +637,7 @@ parameter_types! {
 	pub const SubAccountDeposit: Balance = 2 * DOLLARS;   // 53 bytes on-chain
 	pub const MaxSubAccounts: u32 = 100;
 	pub const MaxAdditionalFields: u32 = 100;
+	pub const MaxRegistrars: u32 = 20;
 }
 
 impl identity::Trait for Runtime {
@@ -648,6 +649,7 @@ impl identity::Trait for Runtime {
 	type SubAccountDeposit = SubAccountDeposit;
 	type MaxSubAccounts = MaxSubAccounts;
 	type MaxAdditionalFields = MaxAdditionalFields;
+	type MaxRegistrars = MaxRegistrars;
 	type RegistrarOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
 	type ForceOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
 }
diff --git a/runtime/westend/src/lib.rs b/runtime/westend/src/lib.rs
index 8e0c87f3e990..b425231a91ec 100644
--- a/runtime/westend/src/lib.rs
+++ b/runtime/westend/src/lib.rs
@@ -483,6 +483,7 @@ parameter_types! {
 	pub const SubAccountDeposit: Balance = 2 * DOLLARS;   // 53 bytes on-chain
 	pub const MaxSubAccounts: u32 = 100;
 	pub const MaxAdditionalFields: u32 = 100;
+	pub const MaxRegistrars: u32 = 20;
 }
 
 impl identity::Trait for Runtime {
@@ -494,6 +495,7 @@ impl identity::Trait for Runtime {
 	type SubAccountDeposit = SubAccountDeposit;
 	type MaxSubAccounts = MaxSubAccounts;
 	type MaxAdditionalFields = MaxAdditionalFields;
+	type MaxRegistrars = MaxRegistrars;
 	type RegistrarOrigin = system::EnsureRoot<AccountId>;
 	type ForceOrigin = system::EnsureRoot<AccountId>;
 }