diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 64ddf7ce..6d5eb8be 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,3 +1,5 @@
+NOTE: Please do not open a pull request that adds or changes the public API without giving consideration to all supported operating systems.
+
 #### What does this pull request do?