diff --git a/skills/systematic-debugging/SKILL.md b/skills/systematic-debugging/SKILL.md
index 111d2a98..b0eca38b 100644
--- a/skills/systematic-debugging/SKILL.md
+++ b/skills/systematic-debugging/SKILL.md
@@ -237,7 +237,7 @@ If you catch yourself thinking:
 - "Is that not happening?" - You assumed without verifying
 - "Will it show us...?" - You should have added evidence gathering
 - "Stop guessing" - You're proposing fixes without understanding
-- "Ultrathink this" - Question fundamentals, not just symptoms
+- "Ultra-think this" - Question fundamentals, not just symptoms
 - "We're stuck?" (frustrated) - Your approach isn't working
 
 **When you see these:** STOP. Return to Phase 1.