diff --git a/satpy/readers/core/config.py b/satpy/readers/core/config.py
index 34abc56d0a..6db2f7ab67 100644
--- a/satpy/readers/core/config.py
+++ b/satpy/readers/core/config.py
@@ -30,9 +30,11 @@
 LOG = logging.getLogger(__name__)
 
 # Old Name -> New Name
-PENDING_OLD_READER_NAMES = {"fci_l1c_fdhsi": "fci_l1c_nc", "viirs_l2_cloud_mask_nc": "viirs_edr"}
+PENDING_OLD_READER_NAMES: dict[str, str] = {}
 OLD_READER_NAMES: dict[str, str] = {
     "slstr_l2": "ghrsst_l2",
+    "fci_l1c_fdhsi": "fci_l1c_nc",
+    "viirs_l2_cloud_mask_nc": "viirs_edr"
 }