diff --git a/vyper/semantics/namespace.py b/vyper/semantics/namespace.py
index 78e6cf38c1..3d065f25a9 100644
--- a/vyper/semantics/namespace.py
+++ b/vyper/semantics/namespace.py
@@ -87,7 +87,6 @@ def update(self, other):
     def clear(self):
         super().clear()
         self.__init__()
-        self._constants = {}
 
     def validate_assignment(self, attr):
         validate_identifier(attr)