diff --git a/src/core_codemods/flask_json_response_type.py b/src/core_codemods/flask_json_response_type.py
index f71723f0..7e1b5aa0 100644
--- a/src/core_codemods/flask_json_response_type.py
+++ b/src/core_codemods/flask_json_response_type.py
@@ -182,7 +182,7 @@ def _has_content_type_set(self, node: cst.BaseExpression) -> bool:
             maybe_subscript = (
                 self.is_subscript_value(maybe_attr) if maybe_attr else None
             )
-            if maybe_assignment := (
+            if (
                 self.is_target_of_assignment(maybe_subscript)
                 if maybe_subscript
                 else None