diff --git a/docs/libs.rst b/docs/libs.rst
index ced52fd2..91593c89 100644
--- a/docs/libs.rst
+++ b/docs/libs.rst
@@ -58,6 +58,7 @@ Old-fashioned macro.
 
 - make-syntactic-closure
 - close-syntax
+- capture-syntactic-environment
 
 - sc-macro-transformer
 - rsc-macro-transformer