diff --git a/Upsilon/StandardLibraries/StaticScope.cs b/Upsilon/StandardLibraries/StaticScope.cs
index 2b0ebdb..8d8a3be 100644
--- a/Upsilon/StandardLibraries/StaticScope.cs
+++ b/Upsilon/StandardLibraries/StaticScope.cs
@@ -47,6 +47,7 @@ namespace Upsilon.StandardLibraries
                 _staticBoundScope                 = boundScope;
                 return _staticBoundScope;
             }
+            set => _staticBoundScope = value;
         }
 
         public static (EvaluationScope, BoundScope) CreateStandardLibrary()