diff --git a/src/Microsoft.Identity.Web/Constants/Constants.cs b/src/Microsoft.Identity.Web/Constants/Constants.cs
index 3ccbb9d26..fb4207eda 100644
--- a/src/Microsoft.Identity.Web/Constants/Constants.cs
+++ b/src/Microsoft.Identity.Web/Constants/Constants.cs
@@ -12,13 +12,13 @@ public static class Constants
         /// LoginHint.
         /// Represents the preferred_username claim in the ID token.
         /// </summary>
-        public const string LoginHint = "loginHint";
+        public const string LoginHint = "login_hint";
 
         /// <summary>
         /// DomainHint.
         /// Determined by the tenant Id.
         /// </summary>
-        public const string DomainHint = "domainHint";
+        public const string DomainHint = "domain_hint";
 
         /// <summary>
         /// Claims.