diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index f0f330bdb..844800d3d 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -968,8 +968,15 @@
   <function name="g_slist_prepend">
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_list_store_set (GtkListStore *list_store,
+                                GtkTreeIter *iter,
+                                ...); -->
   <function name="gtk_list_store_set">
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1"/>
+    <arg nr="2"/>
+    <arg nr="variadic"/>
   </function>
   <function name="gtk_list_store_set_valist">
     <noreturn>false</noreturn>
@@ -986,8 +993,25 @@
   <function name="gtk_box_pack_end_defaults">
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_box_pack_start (GtkBox *box,
+                                GtkWidget *child,
+                                gboolean expand,
+                                gboolean fill,
+                                guint padding); -->
   <function name="gtk_box_pack_start">
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1"/>
+    <arg nr="2"/>
+    <arg nr="3" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="4" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="5" direction="in">
+      <not-uninit/>
+    </arg>
   </function>
   <function name="gtk_box_pack_start_defaults">
     <noreturn>false</noreturn>
@@ -10042,9 +10066,18 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_check_menu_item_set_active (GtkCheckMenuItem *check_menu_item,
+                                            gboolean is_active); -->
   <function name="gtk_check_menu_item_set_active">
     <leak-ignore/>
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
   </function>
   <function name="gtk_check_menu_item_set_draw_as_radio">
     <leak-ignore/>
@@ -10374,9 +10407,19 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_combo_box_set_active (GtkComboBox *combo_box,
+                                      gint index_);-->
   <function name="gtk_combo_box_set_active">
     <leak-ignore/>
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
   </function>
   <function name="gtk_combo_box_set_active_iter">
     <leak-ignore/>
@@ -15303,9 +15346,17 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_spin_button_set_value (GtkSpinButton *spin_button, gdouble value); -->
   <function name="gtk_spin_button_set_value">
     <leak-ignore/>
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
   </function>
   <function name="gtk_spin_button_set_wrap">
     <leak-ignore/>
@@ -19405,13 +19456,26 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- void gtk_window_present (GtkWindow *window); -->
   <function name="gtk_window_present">
     <leak-ignore/>
     <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
   </function>
+  <!-- void gtk_window_present_with_time (GtkWindow *window, guint32 timestamp); -->
   <function name="gtk_window_present_with_time">
     <leak-ignore/>
     <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
   </function>
   <function name="gtk_window_propagate_key_event">
     <leak-ignore/>