diff --git a/anonstream/config.py b/anonstream/config.py
index 28ca288..4223ad2 100644
--- a/anonstream/config.py
+++ b/anonstream/config.py
@@ -116,7 +116,7 @@ def toml_to_flask_section_presence(config):
 def toml_to_flask_section_chat(config):
     cfg = config['chat']
     return {
-        'CHAT_COMMENT_MAX_LENGTH': cfg['max_name_length'],
+        'CHAT_COMMENT_MAX_LENGTH': cfg['max_comment_length'],
         'CHAT_NAME_MAX_LENGTH': cfg['max_name_length'],
         'CHAT_NAME_MIN_CONTRAST': cfg['min_name_contrast'],
         'CHAT_BACKGROUND_COLOUR': color_to_colour(cfg['background_color']),