diff --git a/Upsilon/Binder/Binder.cs b/Upsilon/Binder/Binder.cs
index db4fd2d..6397421 100644
--- a/Upsilon/Binder/Binder.cs
+++ b/Upsilon/Binder/Binder.cs
@@ -330,7 +330,7 @@ namespace Upsilon.Binder
                         if (option == null)
                         {
                             _diagnostics.LogError(
-                                $"No valid function with name '{ubMethod.Name}' and parameter types {string.Join(", ", parameters.Select(x => $"'x.Type'"))} found",
+                                $"No valid function with name '{ubMethod.Name}' and parameter types {string.Join(", ", parameters.Select(x => $"'{x.Type}'"))} found",
                                 expression.Span);
                         }
                         else