Index: src/Views/TabbedBase.vala
--- src/Views/TabbedBase.vala.orig
+++ src/Views/TabbedBase.vala
@@ -83,7 +83,7 @@ public class Tuba.Views.TabbedBase : Views.Base {
 			Adw.BreakpointConditionLengthType.MAX_WIDTH,
 			550, Adw.LengthUnit.SP
 		);
-		var breakpoint = new Adw.Breakpoint (condition);
+		var breakpoint = new Adw.Breakpoint ((owned) condition);
 		breakpoint.add_setter (this, "title-stack-page-visible", true);
 		breakpoint.add_setter (switcher_bar, "reveal", true);
 		add_breakpoint (breakpoint);
