1 files changed, 2 insertions, 2 deletions
diff --git a/htmtl/parsers/when.py b/htmtl/parsers/when.py
index 57a965a..249e5b0 100644
--- a/htmtl/parsers/when.py
+++ b/htmtl/parsers/when.py
@@ -6,9 +6,9 @@ from ..parser import Parser
 class When(Parser):
     def traverse(self, node: Node) -> Optional[Node]:
         if "when" in node.attributes:
-            if not self.expression(node.attributes["when"]):
+            if not self.parse_expression(node.attributes["when"]):
                 return None
 
             node.attributes.pop("when")
 
-        return node
-\ No newline at end of file
+        return node