diff --git a/nomad/datamodel/metainfo/eln/nexus_data_converter.py b/nomad/datamodel/metainfo/eln/nexus_data_converter.py
index 0448da52e1a75f166e7379bb1cf12fb635f4bace..79fe566e6d8d15a7540826de5a3a39cacc00c8c1 100644
--- a/nomad/datamodel/metainfo/eln/nexus_data_converter.py
+++ b/nomad/datamodel/metainfo/eln/nexus_data_converter.py
@@ -87,7 +87,7 @@ def populate_nexus_subsection(
         Exception: could not trigger processing from NexusParser
         Exception: could not trigger processing from NexusParser
     """
-    _, nxdl_f_path = pynxtools_converter.get_nxdl_root_and_path(app_def)
+    _, nxdl_f_path = pynxtools_converter.helpers.get_nxdl_root_and_path(app_def)
 
     # Writing nxs file, parse and populate NeXus subsection:
     if output_file_path: