diff --git a/src/config/Config.zig b/src/config/Config.zig
index 0c1e825ea..50ff638ec 100644
--- a/src/config/Config.zig
+++ b/src/config/Config.zig
@@ -5545,6 +5545,7 @@ pub const Palette = struct {
     /// The actual value that is updated as we parse.
     value: terminal.color.Palette = terminal.color.default,
 
+    /// Keep track of which indexes were manually set by the user.
     mask: Mask = .initEmpty(),
 
     const Mask = std.StaticBitSet(@typeInfo(terminal.color.Palette).array.len);