diff --git a/src/libraries/Microsoft.PowerFx.Interpreter/CustomFunction/ReflectionFunction.cs b/src/libraries/Microsoft.PowerFx.Interpreter/CustomFunction/ReflectionFunction.cs
index c081f4a922..344957360c 100644
--- a/src/libraries/Microsoft.PowerFx.Interpreter/CustomFunction/ReflectionFunction.cs
+++ b/src/libraries/Microsoft.PowerFx.Interpreter/CustomFunction/ReflectionFunction.cs
@@ -217,11 +217,17 @@ internal string GetFunctionName()
             return _info.Name;
         }
 
+        [Obsolete("Soon to be removed.")]
         public FormulaValue Invoke(IServiceProvider serviceProvider, FormulaValue[] args)
         {
             return InvokeAsync(serviceProvider, args, CancellationToken.None).Result;
         }
 
+        public async Task<FormulaValue> InvokeAsync(IServiceProvider serviceProvider, FormulaValue[] args, CancellationToken cancellationToken)
+        {
+            return await InvokeAsync(serviceProvider, (IReadOnlyList<FormulaValue>)args, cancellationToken).ConfigureAwait(false);
+        }
+
         public async Task<FormulaValue> InvokeAsync(IServiceProvider serviceProvider, IReadOnlyList<FormulaValue> args, CancellationToken cancellationToken)
         {
             var info = Scan();