diff --git a/radicale/config.py b/radicale/config.py
index 0e119109..4b7ed8c4 100644
--- a/radicale/config.py
+++ b/radicale/config.py
@@ -276,17 +276,18 @@ def load(paths: Optional[Iterable[Tuple[str, bool]]] = None
     for path, ignore_if_missing in paths:
         parser = RawConfigParser()
         config_source = "config file %r" % path
+        config: types.CONFIG
         try:
-            if not parser.read(path):
-                config = Configuration.SOURCE_MISSING
-                if not ignore_if_missing:
-                    raise RuntimeError("No such file: %r" % path)
-            else:
+            with open(path, "r") as f:
+                parser.read_file(f)
                 config = {s: {o: parser[s][o] for o in parser.options(s)}
                           for s in parser.sections()}
         except Exception as e:
-            raise RuntimeError("Failed to load %s: %s" % (config_source, e)
-                               ) from e
+            if isinstance(e, FileNotFoundError) and ignore_if_missing:
+                config = Configuration.SOURCE_MISSING
+            else:
+                raise RuntimeError("Failed to load %s: %s" % (config_source, e)
+                                   ) from e
         configuration.update(config, config_source)
     return configuration
 
diff --git a/radicale/rights/from_file.py b/radicale/rights/from_file.py
index c7e9c0cd..01fa2fb7 100644
--- a/radicale/rights/from_file.py
+++ b/radicale/rights/from_file.py
@@ -56,8 +56,8 @@ class Rights(rights.BaseRights):
         escaped_user = re.escape(user)
         rights_config = configparser.ConfigParser()
         try:
-            if not rights_config.read(self._filename):
-                raise RuntimeError("No such file: %r" % self._filename)
+            with open(self._filename, "r") as f:
+                rights_config.read_file(f)
         except Exception as e:
             raise RuntimeError("Failed to load rights file %r: %s" %
                                (self._filename, e)) from e