diff --git a/.github/workflows/duplicate-code.yml b/.github/workflows/duplicate-code.yml
index 57f1219d..ccee9b60 100644
--- a/.github/workflows/duplicate-code.yml
+++ b/.github/workflows/duplicate-code.yml
@@ -1,6 +1,6 @@
 name: Duplicate code
 
-on: pull_request
+on: issue_comment
 
 jobs:
   duplicate-code-check: