kc3-lang/kc3

diff --git a/doc/1_KC3/1.09_Block.en.md b/doc/1_KC3/1.09_Block.en.md
index 0accb0a..e4926a6 100644
--- a/doc/1_KC3/1.09_Block.en.md
+++ b/doc/1_KC3/1.09_Block.en.md
@@ -2,8 +2,9 @@
 
 A KC3 block is a source code block. It starts with `do` or `{` and
 ends with `end` or `}` respectively.
-It can be poassed to a special operator or macro function to
-be evaluated explicitly in C with `env_eval_block`.
+It can be passed to a special operator or macro function to
+be evaluated explicitly in C with `env_eval_block` (see
+`libkc3/env_eval.c`).
 
 ## 1.9.1 Examples