diff --git a/src/rougail/convert/convert.py b/src/rougail/convert/convert.py
index cd2947a66..93a10ab4b 100644
--- a/src/rougail/convert/convert.py
+++ b/src/rougail/convert/convert.py
@@ -579,10 +579,10 @@ class ParserVariable:
             for subpath in spath:
                 current = current.children[subpath]
             current.children[name] = option
-            if option.types:
-                parameters = option.types.parameters.copy()
-                parameters.update(option.parameters)
-                option.parameters = parameters
+        if option.types:
+            parameters = option.types.parameters.copy()
+            parameters.update(option.parameters)
+            option.parameters = parameters
 
     def change_namespaces(self, variable):
         for key, value in variable.items():