diff --git a/src/passes/6-transpiler/transpiler.ml b/src/passes/6-transpiler/transpiler.ml
index 0cef7b26b..a7ddc8c31 100644
--- a/src/passes/6-transpiler/transpiler.ml
+++ b/src/passes/6-transpiler/transpiler.ml
@@ -1,3 +1,7 @@
+(* The Transpiler is a function that takes as input the Typed AST, and outputs expressions in a language that is basically a Michelson based on with named variables and first-class-environments.
+
+For more info, see back-end.md: https://gitlab.com/ligolang/ligo/blob/dev/gitlab-pages/docs/contributors/big-picture/back-end.md *)
+
 open! Trace
 open Helpers