diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index e9a88363f..bf4c440cc 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -5,3 +5,4 @@ Before opening a pull-request please do:
   - [ ] Fix any doxygen warnings from your code (see log when building with `-DBUILD_DOCUMENTATION=ON`)
 - [ ] When implementing or updating XEPs add it to `doc/xep.doc`
 - [ ] Add unit tests for everything you've changed or added
+- [ ] On the top level, run `clang-format -i src/<edited-file(s)>`