diff --git a/artiq/compiler/transforms/artiq_ir_generator.py b/artiq/compiler/transforms/artiq_ir_generator.py
index 3872e014e..845ef3189 100644
--- a/artiq/compiler/transforms/artiq_ir_generator.py
+++ b/artiq/compiler/transforms/artiq_ir_generator.py
@@ -238,7 +238,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
         return self.append(ir.Closure(func, self.current_env))
 
     def visit_FunctionDefT(self, node):
-        func = self.visit_function(node, is_lambda=False, is_internal=len(name) > 2)
+        func = self.visit_function(node, is_lambda=False, is_internal=len(self.name) > 2)
         self._set_local(node.name, func)
 
     def visit_Return(self, node):