diff --git a/src/caelestia/utils/wallpaper.py b/src/caelestia/utils/wallpaper.py
index 6699823..cb3efaf 100644
--- a/src/caelestia/utils/wallpaper.py
+++ b/src/caelestia/utils/wallpaper.py
@@ -96,6 +96,7 @@ def get_smart_opts(wall: Path, cache: Path) -> str:
 
 
 def get_colours_for_wall(wall: Path | str, no_smart: bool) -> None:
+    wall = Path(wall)
     scheme = get_scheme()
     cache = wallpapers_cache_dir / compute_hash(wall)