diff --git a/packages/sns/src/index.ts b/packages/sns/src/index.ts
index 7d46e2a53..5968dd3dd 100644
--- a/packages/sns/src/index.ts
+++ b/packages/sns/src/index.ts
@@ -50,6 +50,7 @@ export * from "./errors/governance.errors";
 export * from "./errors/swap.errors";
 export { SnsGovernanceCanister } from "./governance.canister";
 export { SnsGovernanceTestCanister } from "./governance_test.canister";
+export * from "./optionals/optionals";
 export { SnsRootCanister } from "./root.canister";
 export * from "./sns";
 export * from "./sns.wrapper";
diff --git a/packages/sns/src/optionals/optionals.spec.ts b/packages/sns/src/optionals/optionals.spec.ts
new file mode 100644
index 000000000..b0d8fca33
--- /dev/null
+++ b/packages/sns/src/optionals/optionals.spec.ts
@@ -0,0 +1,17 @@
+import type { NeuronsFundParticipationConstraints as SnsNeuronsFundParticipationConstraints } from "../../candid/sns_swap";
+import { emptyOptionalsForSnsNeuronsFundParticipationConstraints } from "./optionals";
+
+// If this file has a compilation error because new optional fields were added
+// to a Candid type, add the empty optional field values to the corresponding
+// `emptyOptionalsFor...` value in `./optionals.ts`.
+
+const testValueForSnsNeuronsFundParticipationConstraints: SnsNeuronsFundParticipationConstraints =
+  {
+    ...emptyOptionalsForSnsNeuronsFundParticipationConstraints,
+    coefficient_intervals: [],
+  };
+
+// The real test is whether the types above are accepted by the compiler.
+it("should have at least one test", () => {
+  expect(true).toBe(true);
+});
diff --git a/packages/sns/src/optionals/optionals.ts b/packages/sns/src/optionals/optionals.ts
new file mode 100644
index 000000000..2c0ffa2e1
--- /dev/null
+++ b/packages/sns/src/optionals/optionals.ts
@@ -0,0 +1,14 @@
+import type { NeuronsFundParticipationConstraints as SnsNeuronsFundParticipationConstraints } from "../../candid/sns_swap";
+
+export interface NeuronsFundParticipationConstraints {}
+
+export const emptyOptionalsForSnsNeuronsFundParticipationConstraints: Pick<
+  SnsNeuronsFundParticipationConstraints,
+  | "max_neurons_fund_participation_icp_e8s"
+  | "min_direct_participation_threshold_icp_e8s"
+  | "ideal_matched_participation_function"
+> = {
+  max_neurons_fund_participation_icp_e8s: [],
+  min_direct_participation_threshold_icp_e8s: [],
+  ideal_matched_participation_function: [],
+};