diff --git a/docs/BuildFromSource.md b/docs/BuildFromSource.md
index 835459f296..27648af722 100644
--- a/docs/BuildFromSource.md
+++ b/docs/BuildFromSource.md
@@ -68,6 +68,8 @@ To update an existing copy, run:
 git submodule update --init --recursive
 ```
 
+**NOTE** some ISPs have been know to use web filtering software that has caused issues with git repository cloning, if you experience issues cloning this repo please review <https://help.github.com/en/github/authenticating-to-github/using-ssh-over-the-https-port>
+
 ## Building in Visual Studio
 
 Before opening our .sln files in Visual Studio or VS Code, you need to perform the following actions.