diff --git a/libs/tk/ytk/gtkcellrendererspin.c b/libs/tk/ytk/gtkcellrendererspin.c
index 2a3961bf20..68e5b9aaae 100644
--- a/libs/tk/ytk/gtkcellrendererspin.c
+++ b/libs/tk/ytk/gtkcellrendererspin.c
@@ -207,7 +207,7 @@ gtk_cell_renderer_spin_set_property (GObject      *object,
 	}
 
       if (obj)
-	priv->adjustment = g_object_ref_sink (obj);
+	priv->adjustment = GTK_ADJUSTMENT (g_object_ref_sink (obj));
       break;
     case PROP_CLIMB_RATE:
       priv->climb_rate = g_value_get_double (value);
diff --git a/libs/tk/ytk/gtkcomboboxtext.c b/libs/tk/ytk/gtkcomboboxtext.c
index 9ffba68766..42c51abebc 100644
--- a/libs/tk/ytk/gtkcomboboxtext.c
+++ b/libs/tk/ytk/gtkcomboboxtext.c
@@ -275,7 +275,7 @@ gtk_combo_box_text_buildable_custom_tag_start (GtkBuildable     *buildable,
 
       parser_data = g_slice_new0 (ItemParserData);
       parser_data->builder = g_object_ref (builder);
-      parser_data->object = g_object_ref (buildable);
+      parser_data->object = G_OBJECT (g_object_ref (buildable));
       parser_data->domain = gtk_builder_get_translation_domain (builder);
       *parser = item_parser;
       *data = parser_data;
diff --git a/libs/tk/ytk/gtkimmodule.c b/libs/tk/ytk/gtkimmodule.c
index 1fcb17a7d8..dcc8e6e886 100644
--- a/libs/tk/ytk/gtkimmodule.c
+++ b/libs/tk/ytk/gtkimmodule.c
@@ -662,7 +662,7 @@ lookup_immodule (gchar **immodules_list)
 	  gboolean found;
 	  gchar *context_id;
 	  found = g_hash_table_lookup_extended (contexts_hash, *immodules_list,
-						&context_id, NULL);
+						(void**)&context_id, NULL);
 	  if (found)
 	    return context_id;
 	}
diff --git a/libs/tk/ytk/gtklabel.c b/libs/tk/ytk/gtklabel.c
index c47de5924f..cf68685536 100644
--- a/libs/tk/ytk/gtklabel.c
+++ b/libs/tk/ytk/gtklabel.c
@@ -1336,7 +1336,7 @@ gtk_label_buildable_custom_tag_start (GtkBuildable     *buildable,
 
       parser_data = g_slice_new0 (PangoParserData);
       parser_data->builder = g_object_ref (builder);
-      parser_data->object = g_object_ref (buildable);
+      parser_data->object = G_OBJECT (g_object_ref (buildable));
       *parser = pango_parser;
       *data = parser_data;
       return TRUE;
diff --git a/libs/tk/ytk/gtktoolpalette.c b/libs/tk/ytk/gtktoolpalette.c
index b984193ca3..f08c159da3 100644
--- a/libs/tk/ytk/gtktoolpalette.c
+++ b/libs/tk/ytk/gtktoolpalette.c
@@ -734,7 +734,7 @@ gtk_tool_palette_add (GtkContainer *container,
 
   g_ptr_array_add (palette->priv->groups, info);
   info->pos = palette->priv->groups->len - 1;
-  info->widget = g_object_ref_sink (child);
+  info->widget = GTK_TOOL_ITEM_GROUP (g_object_ref_sink (child));
 
   gtk_widget_set_parent (child, GTK_WIDGET (palette));
 }
diff --git a/libs/tk/ytk/gtktreeview.c b/libs/tk/ytk/gtktreeview.c
index 5be0720ab0..0fd0a1f8cd 100644
--- a/libs/tk/ytk/gtktreeview.c
+++ b/libs/tk/ytk/gtktreeview.c
@@ -14157,7 +14157,7 @@ gtk_tree_view_set_search_entry (GtkTreeView *tree_view,
 
   if (entry)
     {
-      tree_view->priv->search_entry = GTK_ENTRY (g_object_ref (entry));
+      tree_view->priv->search_entry = GTK_WIDGET (g_object_ref (entry));
       tree_view->priv->search_custom_entry_set = TRUE;
 
       if (tree_view->priv->search_entry_changed_id == 0)
diff --git a/libs/tk/ytk/gtkuimanager.c b/libs/tk/ytk/gtkuimanager.c
index d004cf1ed3..8cbeda9e85 100644
--- a/libs/tk/ytk/gtkuimanager.c
+++ b/libs/tk/ytk/gtkuimanager.c
@@ -503,7 +503,7 @@ gtk_ui_manager_buildable_construct_child (GtkBuildable *buildable,
   g_signal_connect (widget, "hierarchy-changed",
 		    G_CALLBACK (child_hierarchy_changed_cb),
 		    GTK_UI_MANAGER (buildable));
-  return g_object_ref (widget);
+  return G_OBJECT (g_object_ref (widget));
 }
 
 static void
diff --git a/libs/tk/ytk/gtkwidget.c b/libs/tk/ytk/gtkwidget.c
index 9f0d89d3a3..b8f8d78636 100644
--- a/libs/tk/ytk/gtkwidget.c
+++ b/libs/tk/ytk/gtkwidget.c
@@ -10683,7 +10683,7 @@ gtk_widget_buildable_custom_tag_start (GtkBuildable     *buildable,
       AccelGroupParserData *parser_data;
 
       parser_data = g_slice_new0 (AccelGroupParserData);
-      parser_data->object = g_object_ref (buildable);
+      parser_data->object = G_OBJECT (g_object_ref (buildable));
       *parser = accel_group_parser;
       *data = parser_data;
       return TRUE;