diff --git a/doc/intro.txt b/doc/intro.txt
index fc23b41c..8032b938 100644
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -103,7 +103,11 @@ Helpers that depend on {!Unix}, e.g. to spawn sub-processes.
 A small S-expression library. The interface is relatively unstable, but
 the main type ([CCSexp.t]) isn't.
 
-{!modules: CCSexp CCSexpStream CCSexpM}
+{!modules:
+CCSexp
+CCSexpStream
+CCSexpM
+}
 
 {4 Containers.iter}