diff --git a/src/calliope/config.py b/src/calliope/config.py
index 9f471005..3eab9993 100644
--- a/src/calliope/config.py
+++ b/src/calliope/config.py
@@ -67,7 +67,7 @@ def update(self, update_dict: dict, deep: bool = False) -> Self:
                 new_dict[key] = key_class.update(val)
             else:
                 LOGGER.info(
-                    f"Updating {self.model_config["title"]} `{key}`: {key_class} -> {val}"
+                    f"Updating {self.model_config['title']} `{key}`: {key_class} -> {val}"
                 )
                 new_dict[key] = val
         updated = super().model_copy(update=new_dict, deep=deep)