diff --git a/loopy/kernel/tools.py b/loopy/kernel/tools.py
index ac1e00bae4c16a66ac2eedd3c6fdc618894eb027..427d8cb23560f67636578a3c0ece9c510c488e2f 100644
--- a/loopy/kernel/tools.py
+++ b/loopy/kernel/tools.py
@@ -1427,6 +1427,8 @@ def stringify_instruction_list(kernel):
 
     def insert_insn_into_order(insn):
         if insn.id in printed_insn_ids:
+            # Note: dependency cycles are deliberately ignored so that printing
+            # succeeds.
             return
         printed_insn_ids.add(insn.id)