diff --git a/scripts/generate_site.py b/scripts/generate_site.py
index 1a7324a5..e148155f 100644
--- a/scripts/generate_site.py
+++ b/scripts/generate_site.py
@@ -1369,7 +1369,7 @@ def platform_structured_data(name: str, coverage: dict) -> dict:
             }
             identifiers = [
                 f"{field}:{value}"
-                for field in ("sha1", "md5", "crc32")
+                for field in ("sha1", "md5", "crc32", "sha256")
                 for value in _hash_values(entry.get(field))
             ]
             if identifiers:
@@ -1733,7 +1733,10 @@ def _render_platform_systems(
             # System.dat and clrmamepro print, and pasting it found nothing
             # for a pinned file the collection holds under other bytes.
             crc32 = str(cfg_entry.get("crc32") or "")
-            if sha1 or md5 or crc32:
+            # RetroDECK declares sha256 too: dsifirmware.bin's was in the CSV
+            # exports only, and pasting it into the search found nothing.
+            sha256 = str(cfg_entry.get("sha256") or "")
+            if sha1 or md5 or crc32 or sha256:
                 hash_parts = []
                 if sha1:
                     hash_parts.append(f"SHA1: `{sha1}`")
@@ -1741,6 +1744,8 @@ def _render_platform_systems(
                     hash_parts.append(f"MD5: `{md5}`")
                 if crc32:
                     hash_parts.append(f"CRC32: `{crc32}`")
+                if sha256:
+                    hash_parts.append(f"SHA256: `{sha256}`")
                 lines.append(f"{pad}    {' | '.join(hash_parts)}")
 
         lines.append("")
diff --git a/tests/test_site_exports.py b/tests/test_site_exports.py
index 340c8723..c9550f79 100644
--- a/tests/test_site_exports.py
+++ b/tests/test_site_exports.py
@@ -500,6 +500,15 @@ class PlatformPagesCarryTheirDeclarations(unittest.TestCase):
         self.assertEqual(part["identifier"], ["md5:490f666e"])
         self.assertTrue(part["url"].endswith("platforms/batocera/#sony-playstation"))
 
+    def test_a_declared_sha256_is_published(self):
+        """RetroDECK's dsifirmware.bin sha256 lived in the CSV exports only."""
+        from generate_site import platform_structured_data
+
+        data = platform_structured_data("retrodeck", {"platform": "RetroDECK", "config": {
+            "systems": {"nds": {"files": [
+                {"name": "dsifirmware.bin", "sha256": "11A150E3"}]}}}})
+        self.assertEqual(data["hasPart"][0]["identifier"], ["sha256:11a150e3"])
+
 
 
 class AnEmulatorPageLinksItsProfile(unittest.TestCase):