backend: Fix reading the configuration file

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/dnsbl/__init__.py b/src/dnsbl/__init__.py
index dc67c80c4e7b52b753b9c44549c0fc73f4227b78..7f49ccb6b45f9916d01932d63d20f5ce94508447 100644 (file)
--- a/src/dnsbl/__init__.py
+++ b/src/dnsbl/__init__.py
@@ -57,7 +57,7 @@ class Backend(object):
 
                # Parse the file
                if config:
-                       if isinstance(config, io.RawIOBase):
+                       if isinstance(config, io.TextIOWrapper):
                                c.read_file(config)
                        else:
                                c.read([config])