--- a/svghmi/svghmi.py	Fri Mar 15 09:20:11 2024 +0100
+++ b/svghmi/svghmi.py	Mon Mar 18 18:43:41 2024 +0100
@@ -559,7 +559,7 @@
             hmi_tree_root._hash(hasher)
             pofiles = GetPoFiles(self.CTNPath())
             filestocheck = [svgfile] + \
-                           (list(zip(*pofiles)[1]) if pofiles else []) + \
+                           (list(list(zip(*pofiles))[1]) if pofiles else []) + \
                            self.GetFontsFiles()
 
             for filetocheck in filestocheck: