diff --git a/crates/ui-egui/src/panels/timeline.rs b/crates/ui-egui/src/panels/timeline.rs
index ea18c7f1e..b06ba14e3 100644
--- a/crates/ui-egui/src/panels/timeline.rs
+++ b/crates/ui-egui/src/panels/timeline.rs
@@ -2721,7 +2721,9 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
                 let gr = ui.interact(gr_rect, egui::Id::unique(("grow", uid)), Sense::click());
                 app.auto.add(&format!("timeline.group.{uid}.name"), gr_rect, name);
                 if gr.clicked() && uid & (WAVE_BIT | GEOM_BIT) == 0 {
-                    actions.push(("prop.select".into(), json!({"layer": layer.id.0, "prop": uid, "selectKeys": false})));
+                    // Shift adds the group to the selection, as on a property row (#1751).
+                    let add = ui.input(|i| i.modifiers.shift);
+                    actions.push(("prop.select".into(), json!({"layer": layer.id.0, "prop": uid, "selectKeys": false, "add": add})));
                 }
                 if gr.double_clicked() {
                     if fx.is_some() {