diff --git a/syng/sources/filebased.py b/syng/sources/filebased.py
index e6272ab..f271303 100644
--- a/syng/sources/filebased.py
+++ b/syng/sources/filebased.py
@@ -17,7 +17,7 @@ except ImportError:
     PYMEDIAINFO_AVAILABLE = False
 
 from .source import Source
-from ..config import BoolOption, ListStrOption, ConfigOption
+from ..config import ListStrOption, ConfigOption
 
 
 class FileBasedSource(Source):
@@ -34,10 +34,10 @@ class FileBasedSource(Source):
             "List of filename extensions\n(mp3+cdg, mp4, ...)",
             ["mp3+cdg"],
         ),
-        "build_index": ConfigOption(BoolOption(), "Build index on startup", True),
     }
 
     def apply_config(self, config: dict[str, Any]) -> None:
+        self.build_index = True
         self.extensions: list[str] = config["extensions"] if "extensions" in config else ["mp3+cdg"]
         self.extra_mpv_options = {"scale": "oversample"}
 
diff --git a/syng/sources/source.py b/syng/sources/source.py
index 4f3a790..950eb56 100644
--- a/syng/sources/source.py
+++ b/syng/sources/source.py
@@ -127,7 +127,7 @@ class Source(ABC):
         self._index: list[str] = config["index"] if "index" in config else []
         self.extra_mpv_options: dict[str, str] = {}
         self._skip_next = False
-        self.build_index = config.get("build_index", False)
+        self.build_index = False
         self.apply_config(config)
 
     def is_valid(self, entry: Entry) -> bool: