diff --git a/admin_manual/installation/php_configuration.rst b/admin_manual/installation/php_configuration.rst
index 265f1af66..4159d6eff 100644
--- a/admin_manual/installation/php_configuration.rst
+++ b/admin_manual/installation/php_configuration.rst
@@ -44,7 +44,7 @@ Database connectors (pick the one for your database):
 
 * PHP module intl (increases language translation performance and fixes sorting
   of non-ASCII characters)
-* PHP module sodium (for Argon2 for password hashing. bcrypt is used as fallback, but if passwords were hashed with Argon2 already and the module is missing, your users can't log in.)
+* PHP module sodium (for Argon2 for password hashing. bcrypt is used as fallback, but if passwords were hashed with Argon2 already and the module is missing, your users can't log in. Included with PHP >= 7.2)
 
 Required for specific apps: