diff --git a/Upsilon/Binder/VariableSymbols/ScriptFunctionVariableSymbol.cs b/Upsilon/Binder/VariableSymbols/ScriptFunctionVariableSymbol.cs
index 7b65b2d..f0e4d32 100644
--- a/Upsilon/Binder/VariableSymbols/ScriptFunctionVariableSymbol.cs
+++ b/Upsilon/Binder/VariableSymbols/ScriptFunctionVariableSymbol.cs
@@ -69,7 +69,7 @@ namespace Upsilon.Binder.VariableSymbols
         public ImmutableArray<VariableSymbol> Parameters { get; }
         public bool                           IsBound    { get; set; }
 
-        public ScriptFunctionVariableOption(Type resultType, ImmutableArray<VariableSymbol> parameters) : base(resultType)
+        public ScriptFunctionVariableOption(TypeContainer resultType, ImmutableArray<VariableSymbol> parameters) : base(resultType)
         {
             Parameters = parameters;
         }