diff --git a/backend/pashub_fetcher/core_files.py b/backend/pashub_fetcher/core_files.py
index 72ef15f8..4b1023d2 100644
--- a/backend/pashub_fetcher/core_files.py
+++ b/backend/pashub_fetcher/core_files.py
@@ -69,6 +69,8 @@ def core_file_for(
         return CoreFiles.RETROFIT_DESIGN_DOC
     if CoreFiles.IMPROVEMENT_OPTION_EVALUATION.value in filename:
         return CoreFiles.IMPROVEMENT_OPTION_EVALUATION
+    if CoreFiles.MEDIUM_TERM_IMPROVEMENT_PLAN.value in filename:
+        return CoreFiles.MEDIUM_TERM_IMPROVEMENT_PLAN
     raise NotImplementedError