diff --git a/gtk/inspector/object-tree.c b/gtk/inspector/object-tree.c
index b86f9bcbe5..bda662c094 100644
--- a/gtk/inspector/object-tree.c
+++ b/gtk/inspector/object-tree.c
@@ -1312,10 +1312,22 @@ gtk_inspector_object_tree_select_object (GtkInspectorObjectTree *wt,
                              GTK_LIST_SCROLL_SELECT | GTK_LIST_SCROLL_FOCUS,
                              NULL);
 
-  g_signal_emit (wt, signals[OBJECT_SELECTED], 0, object); // FIXME
+  g_signal_emit (wt, signals[OBJECT_SELECTED], 0, object);
   g_object_unref (row_item);
 }
 
+static void
+on_selected_item (GtkSingleSelection     *selection,
+                  GParamSpec             *pspec,
+                  GtkInspectorObjectTree *wt)
+{
+  GObject *selected = gtk_single_selection_get_selected_item (selection);
+  GtkTreeListRow *row = GTK_TREE_LIST_ROW (selected);
+  GObject *object = gtk_tree_list_row_get_item (row);
+  g_signal_emit (wt, signals[OBJECT_SELECTED], 0, object);
+  g_object_unref (object);
+}
+
 void
 gtk_inspector_object_tree_set_display (GtkInspectorObjectTree *wt,
                                        GdkDisplay *display)
@@ -1329,4 +1341,5 @@ gtk_inspector_object_tree_set_display (GtkInspectorObjectTree *wt,
   wt->priv->selection = gtk_single_selection_new (g_object_ref (G_LIST_MODEL (wt->priv->tree_model)));
   gtk_column_view_set_model (GTK_COLUMN_VIEW (wt->priv->list),
                              GTK_SELECTION_MODEL (wt->priv->selection));
+  g_signal_connect (wt->priv->selection, "notify::selected-item", G_CALLBACK (on_selected_item), wt);
 }