=== modified file 'lib/Widgets/DynamicNotebook.vala'
--- lib/Widgets/DynamicNotebook.vala	2014-07-31 12:41:52 +0000
+++ lib/Widgets/DynamicNotebook.vala	2014-08-30 13:28:37 +0000
@@ -658,10 +658,19 @@
        /**
         * The text shown in the add button tooltip
         */
+#if VALA_0_26
+        public string add_button_tooltip {
+            get { _add_button_tooltip = add_button.tooltip_text; return _add_button_tooltip; }
+            set { add_button.tooltip_text = value; }
+        }
+        // Use temporary field to avoid breaking API this can be dropped while preparing for 0.4
+        string _add_button_tooltip;
+#else
         public string add_button_tooltip {
             get { return add_button.tooltip_text; }
             set { add_button.tooltip_text = value; }
         }
+#endif
 
         public Tab current {
             get { return tabs.nth_data (notebook.get_current_page ()); }