diff --git a/hisscl/ast.py b/hisscl/ast.py
index d1bd9c9..84003e4 100644
--- a/hisscl/ast.py
+++ b/hisscl/ast.py
@@ -40,7 +40,7 @@ class VariableRef:
 @dataclasses.dataclass
 class FunctionCall:
     pos: Position
-    value: 'Val'
+    value: 'Value'
     args: list['Value']
 
 Ref = VariableRef | FunctionCall