diff --git a/Sources/OktaIdx/Capabilities/IDXDuoCapability.swift b/Sources/OktaIdx/Capabilities/IDXDuoCapability.swift
index b2d13249..66a7d36a 100644
--- a/Sources/OktaIdx/Capabilities/IDXDuoCapability.swift
+++ b/Sources/OktaIdx/Capabilities/IDXDuoCapability.swift
@@ -9,7 +9,7 @@ import Foundation
 
 extension Capability {
     /// Capability to access data related to Duo
-    public struct Duo: AuthenticatorCapability {
+    public class Duo: AuthenticatorCapability {
         public let host: String
         public let signedToken: String
         public let script: String
@@ -27,5 +27,12 @@ extension Capability {
             
             signatureField.value = signatureData
         }
+        
+        init(host: String, signedToken: String, script: String, signatureData: String? = nil) {
+            self.host = host
+            self.signedToken = signedToken
+            self.script = script
+            self.signatureData = signatureData
+        }
     }
 }
diff --git a/Sources/OktaIdx/Internal/Implementations/Version1/Responses/IDXClient+V1ResponseConstructors.swift b/Sources/OktaIdx/Internal/Implementations/Version1/Responses/IDXClient+V1ResponseConstructors.swift
index a56010a0..a6e39e34 100644
--- a/Sources/OktaIdx/Internal/Implementations/Version1/Responses/IDXClient+V1ResponseConstructors.swift
+++ b/Sources/OktaIdx/Internal/Implementations/Version1/Responses/IDXClient+V1ResponseConstructors.swift
@@ -353,7 +353,7 @@ extension Capability.OTP {
 }
 
 extension Capability.Duo {
-    init?(flow: InteractionCodeFlowAPI, ion authenticators: [IonAuthenticator]) {
+    convenience init?(flow: InteractionCodeFlowAPI, ion authenticators: [IonAuthenticator]) {
         // Exit early if none of the authenticators have a "duo" method
         let methods = methodTypes(from: authenticators)
         guard methods.contains(.duo) else {