diff --git a/conservancy_beancount/reports/core.py b/conservancy_beancount/reports/core.py
index cac844c..39438f4 100644
--- a/conservancy_beancount/reports/core.py
+++ b/conservancy_beancount/reports/core.py
@@ -1172,7 +1172,7 @@ class BaseODS(BaseSpreadsheet[RT, ST], metaclass=abc.ABCMeta):
                 # '..' pops the ODS filename off the link path. In other words,
                 # make the link relative to the directory the ODS is in.
                 href_path = Path('..', href)
-                href = str(href_path)
+                href = urlparse.quote(str(href_path))
                 text = href_path.name
             else:
                 rt_path = urlparse.urlparse(rt_href).path
diff --git a/tests/test_reports_spreadsheet.py b/tests/test_reports_spreadsheet.py
index 99342ab..648ebe9 100644
--- a/tests/test_reports_spreadsheet.py
+++ b/tests/test_reports_spreadsheet.py
@@ -617,6 +617,7 @@ def test_ods_writer_meta_links_cell(ods_writer):
         'rt://ticket/2/attachments/9',
         'rt:1/5',
         'Invoices/0123.pdf',
+        'Invoice #789.pdf',
     ]
     cell = ods_writer.meta_links_cell(meta_links, stylename='meta1')
     assert cell.getAttribute('valuetype') == 'string'
@@ -642,6 +643,10 @@ def test_ods_writer_meta_links_cell(ods_writer):
     expect_url = f'../{meta_links[3]}'
     assert child.getAttribute('href') == expect_url
     assert get_text(child) == '0123.pdf'
+    child = next(children)
+    assert child.getAttribute('type') == 'simple'
+    assert child.getAttribute('href') == '../Invoice%20%23789.pdf'
+    assert get_text(child) == 'Invoice #789.pdf'
 
 def test_ods_writer_multiline_cell(ods_writer):
     cell = ods_writer.multiline_cell(iter(STRING_CELL_DATA))