diff --git a/level/palette.go b/level/palette.go
index 7ad6cb5..e419ad8 100644
--- a/level/palette.go
+++ b/level/palette.go
@@ -147,7 +147,7 @@ func (p *PaletteContainer[T]) ReadFrom(r io.Reader) (n int64, err error) {
 	if err != nil {
 		return n, err
 	}
-	return n, p.data.Fix(int(nBits))
+	return n, p.data.Fix(p.bits)
 }
 
 func (p *PaletteContainer[T]) WriteTo(w io.Writer) (n int64, err error) {