diff --git a/docling/document_converter.py b/docling/document_converter.py
index 6294c166..08095d43 100644
--- a/docling/document_converter.py
+++ b/docling/document_converter.py
@@ -126,9 +126,6 @@ def _get_default_option(format: InputFormat) -> FormatOption:
         InputFormat.XLSX: FormatOption(
             pipeline_cls=SimplePipeline, backend=MsExcelDocumentBackend
         ),
-        InputFormat.XLSM: FormatOption(
-            pipeline_cls=SimplePipeline, backend=MsExcelDocumentBackend
-        ),
         InputFormat.DOCX: FormatOption(
             pipeline_cls=SimplePipeline, backend=MsWordDocumentBackend
         ),