diff --git a/swh/indexer/metadata_dictionary.py b/swh/indexer/metadata_dictionary.py
--- a/swh/indexer/metadata_dictionary.py
+++ b/swh/indexer/metadata_dictionary.py
@@ -603,6 +603,10 @@
     def normalize_home_page(self, urls):
         return [{'@id': url} for url in urls]
 
+    def normalize_keywords(self, keywords):
+        return list(itertools.chain.from_iterable(
+            s.split(' ') for s in keywords))
+
     def normalize_license(self, licenses):
         return [{'@id': license} for license in licenses]
 
diff --git a/swh/indexer/tests/test_metadata.py b/swh/indexer/tests/test_metadata.py
--- a/swh/indexer/tests/test_metadata.py
+++ b/swh/indexer/tests/test_metadata.py
@@ -953,6 +953,20 @@
             'description': 'foo\nHydrology N°83',
         })
 
+    def test_compute_metadata_pkginfo_keywords(self):
+        raw_content = (b"""\
+Metadata-Version: 2.1
+Name: foo
+Keywords: foo bar baz
+""") # noqa
+        result = self.pkginfo_mapping.translate(raw_content)
+        self.assertEqual(result, {
+            '@context': 'https://doi.org/10.5063/schema/codemeta-2.0',
+            'type': 'SoftwareSourceCode',
+            'name': 'foo',
+            'keywords': ['foo', 'bar', 'baz'],
+        })
+
     def test_compute_metadata_pkginfo_license(self):
         raw_content = (b"""\
 Metadata-Version: 2.1