diff --git a/doc/src/Packages_details.rst b/doc/src/Packages_details.rst
index f2291b231e..525584a8fa 100644
--- a/doc/src/Packages_details.rst
+++ b/doc/src/Packages_details.rst
@@ -931,6 +931,9 @@ EXTRA-MOLECULE package
 **Contents:**
 
 Additional bond, angle, dihedral, and improper styles that are less commonly used.
+**Install:**
+
+To use this package, also the :ref:`MOLECULE <PKG-MOLECULE>` package needs to be installed.
 
 **Supporting info:**