diff --git a/scripts/wk/debug.py b/scripts/wk/debug.py
index 437ab0f8..e0fe75bf 100644
--- a/scripts/wk/debug.py
+++ b/scripts/wk/debug.py
@@ -20,13 +20,20 @@ METHOD_TYPE = type(DEBUG_CLASS.method)
 def generate_object_report(obj, indent=0):
   """Generate debug report for obj, returns list."""
   report = []
+  attr_list = []
+
+  # Get attribute list
+  if hasattr(obj, '__slots__'):
+    attr_list = list(obj.__slots__)
+  else:
+    attr_list = [name for name in dir(obj) if not name.startswith('_')]
 
   # Dump object data
-  for name in dir(obj):
+  for name in attr_list:
     attr = getattr(obj, name)
 
-    # Skip methods and private attributes
-    if isinstance(attr, METHOD_TYPE) or name.startswith('_'):
+    # Skip methods
+    if isinstance(attr, METHOD_TYPE):
       continue
 
     # Add attribute to report (expanded if necessary)