diff --git a/src/headers/SemanticAnalysis.hpp b/src/headers/SemanticAnalysis.hpp
index d1feadb..23062dc 100644
--- a/src/headers/SemanticAnalysis.hpp
+++ b/src/headers/SemanticAnalysis.hpp
@@ -46,6 +46,11 @@ private:
             ),
             share_task(Function, Class),
             share_task(Function, Define<true>),
+            make_nonlocal_task(Define<false>,
+                if (parsedTree.findReferenceByName<Define<true>>(parseComponent.name).has_value()) {
+                    error(parseComponent.name + string(" cannot be redefined as it is final"), parseComponent.line);
+                }
+            )
         };
     };
 };