diff --git a/src/config/Config.zig b/src/config/Config.zig
index f803ca12d..cb1964010 100644
--- a/src/config/Config.zig
+++ b/src/config/Config.zig
@@ -3653,6 +3653,8 @@ else
 /// will switch between tabs. Scrolling left goes to the next tab and
 /// scrolling right goes to the previous tab. Set this to `false` to
 /// disable this behavior.
+///
+/// Available since 1.4.0.
 @"gtk-horizontal-tab-scroll": bool = true,
 
 /// Custom CSS files to be loaded.