diff --git a/libervia/backend/plugins/plugin_misc_text_syntaxes.py b/libervia/backend/plugins/plugin_misc_text_syntaxes.py
index 05b8a6b1..35eb45a5 100644
--- a/libervia/backend/plugins/plugin_misc_text_syntaxes.py
+++ b/libervia/backend/plugins/plugin_misc_text_syntaxes.py
@@ -33,11 +33,18 @@ from libervia.backend.tools import xml_tools
 
 try:
     from lxml import html
-    from lxml.html import clean
     from lxml import etree
 except ImportError:
     raise exceptions.MissingModule(
-        "Missing module lxml, please download/install it from http://lxml.de/"
+        'Missing module "lxml", please download/install it from http://lxml.de/'
+    )
+try:
+    from lxml.html import clean
+except ImportError:
+    raise exceptions.MissingModule(
+        'Missing module "lxml_html_clean". Please download and install it from '
+        'http://lxml.de/. Note that this is a separate package to install in addition '
+        'to "lxml".'
     )
 
 log = getLogger(__name__)