diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7ca56a6829..1722da6d56 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,6 +5,8 @@
 
 Contribution are most welcome! All `tldr` pages are stored in Markdown right here on GitHub. Just open an issue or send a pull request and we'll merge it as soon as possible.
 
+*Note: when submitting a new command, don't forget to check if there's already a pull request in progress.*
+
 ## Guidelines
 
 Note that `tldr` is focussed on concrete examples.