diff --git a/src/Microsoft.IdentityModel.Protocols.OpenIdConnect/OpenIdConnectGrantTypes.cs b/src/Microsoft.IdentityModel.Protocols.OpenIdConnect/OpenIdConnectGrantTypes.cs
index 65e46dfc2..53ce222ac 100644
--- a/src/Microsoft.IdentityModel.Protocols.OpenIdConnect/OpenIdConnectGrantTypes.cs
+++ b/src/Microsoft.IdentityModel.Protocols.OpenIdConnect/OpenIdConnectGrantTypes.cs
@@ -13,6 +13,11 @@ public static class OpenIdConnectGrantTypes
         public const string RefreshToken = "refresh_token";
         public const string Password = "password";
         public const string ClientCredentials = "client_credentials";
+        public const string Saml2Bearer = "urn:ietf:params:oauth:grant-type:saml2-bearer";
+        public const string JwtBearer = "urn:ietf:params:oauth:grant-type:jwt-bearer";
+        public const string DeviceCode = "urn:ietf:params:oauth:grant-type:device_code";
+        public const string TokenExchange = "urn:ietf:params:oauth:grant-type:token-exchange";
+        public const string Ciba = "urn:openid:params:grant-type:ciba";
 #pragma warning restore 1591
     }
 }