Add disclaimer
diff --git a/README.md b/README.md
index ba8abce..35c4818 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 These libraries define symbolic names for some character codes.
 
+This is not an official Goggle package, and is not supported by Google.
+
 ## Using
 
 Import either one of the libraries: