diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 633eb8bb02..a32e8483f8 100644
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -16,6 +16,7 @@ import zipfile
 
 try:
     import xml.etree.cElementTree as ET
+    Logger.log("w", "Unable to load cElementTree, switching to slower version")
 except ImportError:
     import xml.etree.ElementTree as ET