diff --git a/Branching-and-Merging.md b/Branching-and-Merging.md
index 1b6ed9a..194d686 100644
--- a/Branching-and-Merging.md
+++ b/Branching-and-Merging.md
@@ -31,6 +31,8 @@ git push -u origin your_branch_name
 
 ## Rebase and non-ff-merge into master when you're done
 
+We want a merge commit present for all code merged from PRs, even if that PR is only one commit. The merge commit documents that the merge came from a PR. This helps us differentiate between commits to straight master.
+
 ```
 git fetch
 git rebase origin/master