diff --git a/artiq/transforms/inline.py b/artiq/transforms/inline.py
index 98851a360..afb5898cd 100644
--- a/artiq/transforms/inline.py
+++ b/artiq/transforms/inline.py
@@ -453,7 +453,8 @@ def get_attr_writeback(attribute_namespace, rpc_mapper, loc_node):
             if hasattr(attr_info.obj, attr):
                 val = getattr(attr_info.obj, attr)
                 if (not isinstance(val, int)
-                        or isinstance(val, core_language.int64)):
+                        or isinstance(val, core_language.int64)
+                        or isinstance(val, bool)):
                     continue
             #