diff --git a/poezio/config.py b/poezio/config.py
index f7d73164..f3c5f375 100644
--- a/poezio/config.py
+++ b/poezio/config.py
@@ -168,7 +168,7 @@ class Config(RawConfigParser):
         self.default = default
 
     def read_file(self):
-        RawConfigParser.read(self, self.file_name, encoding='utf-8')
+        RawConfigParser.read(self, str(self.file_name), encoding='utf-8')
         # Check config integrity and fix it if it’s wrong
         # only when the object is the main config
         if self.__class__ is Config: