diff --git a/lib/charms/postgresql_k8s/v1/postgresql.py b/lib/charms/postgresql_k8s/v1/postgresql.py
index 9bf411e80b..230fad343f 100644
--- a/lib/charms/postgresql_k8s/v1/postgresql.py
+++ b/lib/charms/postgresql_k8s/v1/postgresql.py
@@ -20,6 +20,8 @@
 """
 
 import logging
+import os
+import pwd
 from collections import OrderedDict
 from typing import Dict, List, Optional, Set, Tuple
 
@@ -1058,6 +1060,11 @@ def set_up_database(self, temp_location: Optional[str] = None) -> None:
             cursor = connection.cursor()
 
             if temp_location is not None:
+                # Fix permissions on the temporary tablespace location when a reboot happens and tmpfs is being used.
+                user = pwd.getpwnam("_daemon_")
+                os.chown(temp_location, uid=user.pw_uid, gid=user.pw_gid)
+                os.chmod(temp_location, 0o700)
+
                 cursor.execute("SELECT TRUE FROM pg_tablespace WHERE spcname='temp';")
                 if cursor.fetchone() is None:
                     cursor.execute(f"CREATE TABLESPACE temp LOCATION '{temp_location}';")