diff --git a/cloudinit/config/cc_disk_setup.py b/cloudinit/config/cc_disk_setup.py
index f61622720cc..e82ea36b4d3 100644
--- a/cloudinit/config/cc_disk_setup.py
+++ b/cloudinit/config/cc_disk_setup.py
@@ -1299,7 +1299,9 @@ def mkfs(fs_cfg):
                 device = f"{device}p"
             device = "%s%s" % (device, partition)
             if not Path(device).is_block_device():
-                LOG.warning("Path %s does not exist or is not a block device")
+                LOG.warning(
+                    "Path %s does not exist or is not a block device", device
+                )
                 return
             LOG.debug(
                 "Manual request of partition %s for %s", partition, device
diff --git a/cloudinit/distros/raspberry_pi_os.py b/cloudinit/distros/raspberry_pi_os.py
index 5358b537225..2c71ea57244 100644
--- a/cloudinit/distros/raspberry_pi_os.py
+++ b/cloudinit/distros/raspberry_pi_os.py
@@ -65,7 +65,7 @@ def apply_locale(self, locale, out_fn=None, keyname="LANG"):
                     ]
                 )
             else:
-                LOG.error("Failed to set locale %s")
+                LOG.error("Failed to set locale %s", locale)
 
     def add_user(self, name, **kwargs) -> bool:
         """