diff --git a/src/Identity/IdentityServer/RequestValidators/OpaqueKeyExchangeGrantValidator.cs b/src/Identity/IdentityServer/RequestValidators/OpaqueKeyExchangeGrantValidator.cs
index 5016d1f4bd..42f30eb82d 100644
--- a/src/Identity/IdentityServer/RequestValidators/OpaqueKeyExchangeGrantValidator.cs
+++ b/src/Identity/IdentityServer/RequestValidators/OpaqueKeyExchangeGrantValidator.cs
@@ -55,6 +55,7 @@ public class OpaqueKeyExchangeGrantValidator : BaseRequestValidator<ExtensionGra
             userDecryptionOptionsBuilder)
     {
         _opaqueKeyExchangeService = opaqueKeyExchangeService;
+        _featureService = featureService;
     }
 
     string IExtensionGrantValidator.GrantType => "opaque-ke";