diff --git a/WebApiThrottle.Tests/WebApiThrottle.Tests.csproj b/WebApiThrottle.Tests/WebApiThrottle.Tests.csproj
index c54f60d..17c1164 100644
--- a/WebApiThrottle.Tests/WebApiThrottle.Tests.csproj
+++ b/WebApiThrottle.Tests/WebApiThrottle.Tests.csproj
@@ -68,6 +68,9 @@
       <Name>WebApiThrottle.StrongName</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/WebApiThrottle/ThrottlePolicy.cs b/WebApiThrottle/ThrottlePolicy.cs
index 80894f7..611f5ae 100644
--- a/WebApiThrottle/ThrottlePolicy.cs
+++ b/WebApiThrottle/ThrottlePolicy.cs
@@ -21,6 +21,7 @@ public ThrottlePolicy()
             EndpointWhitelist = new List<string>();
             EndpointRules = new Dictionary<string, RateLimits>();
             Rates = new Dictionary<RateLimitPeriod, long>();
+            StringComparerForClients = StringComparer.CurrentCulture;
         }
 
         /// <summary>
@@ -90,6 +91,7 @@ public ThrottlePolicy(long? perSecond = null, long? perMinute = null, long? perH
         public bool StackBlockedRequests { get; set; }
 
         public Dictionary<RateLimitPeriod, long> Rates { get; set; }
+        public IEqualityComparer<string> StringComparerForClients { get; set; }
 
         public static ThrottlePolicy FromStore(IThrottlePolicyProvider provider)
         {
diff --git a/WebApiThrottle/ThrottlingCore.cs b/WebApiThrottle/ThrottlingCore.cs
index a179792..fa64679 100644
--- a/WebApiThrottle/ThrottlingCore.cs
+++ b/WebApiThrottle/ThrottlingCore.cs
@@ -98,7 +98,7 @@ internal bool IsWhitelisted(RequestIdentity requestIdentity)
 
             if (Policy.ClientThrottling)
             {
-                if (Policy.ClientWhitelist != null && Policy.ClientWhitelist.Contains(requestIdentity.ClientKey))
+                if (Policy.ClientWhitelist != null && Policy.ClientWhitelist.Contains(requestIdentity.ClientKey, Policy.StringComparerForClients))
                 {
                     return true;
                 }