diff --git a/README.md b/README.md
index 037cccf0d0..8d8dd656fd 100644
--- a/README.md
+++ b/README.md
@@ -8,5 +8,7 @@ The current version targets Minecraft version **16w32b**.
 
 Compile Enigma from [here](https://github.com/OpenModLoader/Enigma) using Gradle and run it from build/libs.
 
+Please remember that copying and pasting mappings from alternate projects under more restrictive licenses (such as MCP) is **completely forbidden**. It is also good to consult name changes with other people via pull requests.
+
 **NOTE:** The current version of OML's Enigma has a bug where it won't save mappings for unnamed classes. In that case, rename them to something like 
 "unnamed/axy" if the class name is "axy".