diff --git a/Backend-libXML/Parser.py b/Backend-libXML/Parser.py
index a76f67d..3b492b1 100644
--- a/Backend-libXML/Parser.py
+++ b/Backend-libXML/Parser.py
@@ -17,7 +17,7 @@ def xpath(source: str, xpath: str) -> str:
     root = etree.XML(source)
     nsmap = root.nsmap
 
-    # LXML doesn't accept namespace with None key,
+    # LXML doesn't accept empty (None) namespace prefix,
     # so it need to be deleted if exists
     if None in nsmap:
         nsmap.pop(None)