diff --git a/scripts/generate_site.py b/scripts/generate_site.py
index 0caabb92..b1a5626f 100644
--- a/scripts/generate_site.py
+++ b/scripts/generate_site.py
@@ -654,14 +654,22 @@ def build_emulator_gap_report(
         for k, v in profiles.items()
         if v.get("type") not in ("alias", "test")
     }
-    from common import standalone_set
+    from common import platform_declarations, standalone_set
+    from validation import case_folded_slots
 
+    # The command line passes these too: without them a RetroBat file named
+    # 32X_G_BIOS.BIN read as missing for a core opening 32X_G_BIOS.bin.
+    folded = frozenset().union(*(
+        case_folded_slots(cov["config"], platform_declarations(cov["config"], db))
+        for cov in coverages.values()
+    ))
     return run_cross_reference(
         unique_profiles, declared, db,
         data_names=data_names, all_declared=all_declared,
         standalone_cores=set().union(
             *(standalone_set(cov["config"]) for cov in coverages.values())
         ),
+        folded_slots=folded,
     )
 
 
diff --git a/tests/test_gap_settlement.py b/tests/test_gap_settlement.py
index d86c4c4a..68304498 100644
--- a/tests/test_gap_settlement.py
+++ b/tests/test_gap_settlement.py
@@ -97,5 +97,25 @@ class TheRunningBuildPlacesTheGap(unittest.TestCase):
         self.assertEqual(self._gap_paths(set()), ["Cemu/keys.txt"])
 
 
+class EveryGapReportFoldsCase(unittest.TestCase):
+    """The command line passed folded_slots and the site did not, so the
+    gaps page listed RetroBat files the CLI report settled."""
+
+    def test_each_cross_reference_call_passes_the_folded_slots(self):
+        import ast
+
+        for script in ("cross_reference.py", "generate_site.py"):
+            source = (REPO_ROOT / "scripts" / script).read_text(encoding="utf-8")
+            calls = [
+                node for node in ast.walk(ast.parse(source))
+                if isinstance(node, ast.Call)
+                and getattr(node.func, "id", "") in ("cross_reference", "run_cross_reference")
+            ]
+            with self.subTest(script=script):
+                self.assertTrue(calls)
+                for call in calls:
+                    self.assertIn("folded_slots", {kw.arg for kw in call.keywords})
+
+
 if __name__ == "__main__":
     unittest.main()