diff --git a/src/processor/ledger/beancount_to_jsonl.py b/src/processor/ledger/beancount_to_jsonl.py
index 1cac6b85..21dbcfb9 100644
--- a/src/processor/ledger/beancount_to_jsonl.py
+++ b/src/processor/ledger/beancount_to_jsonl.py
@@ -81,7 +81,10 @@ def get_beancount_files(beancount_files=None, beancount_file_filter=None, verbos
 
     all_beancount_files = absolute_beancount_files | filtered_beancount_files
 
-    files_with_non_beancount_extensions = {beancount_file for beancount_file in all_beancount_files if not beancount_file.endswith(".bean")}
+    files_with_non_beancount_extensions = {beancount_file
+                                    for beancount_file
+                                    in all_beancount_files
+                                    if not beancount_file.endswith(".bean") and not beancount_file.endswith(".beancount")}
     if any(files_with_non_beancount_extensions):
         print(f"[Warning] There maybe non beancount files in the input set: {files_with_non_beancount_extensions}")