diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index 030c71b30..b120f3fb8 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -2305,6 +2305,43 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- gpointer g_object_get_data (GObject *object, const gchar *key); -->
+  <function name="g_object_get_data">
+    <noreturn>false</noreturn>
+    <returnValue type="gpointer"/>
+    <use-retval/>
+    <leak-ignore/>
+    <arg nr="1"/>
+    <arg nr="2" direction="in">
+      <not-bool/>
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- void g_object_set_data (GObject *object, const gchar *key, gpointer data); -->
+  <function name="g_object_set_data">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1"/>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="3">
+      <not-bool/>
+    </arg>
+  </function>
+  <!-- void g_object_set_data_full (GObject *object, const gchar *key, gpointer data, GDestroyNotify destroy); -->
+  <function name="g_object_set_data_full">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1"/>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="3"/>
+    <arg nr="4">
+      <not-bool/>
+    </arg>
+  </function>
   <function name="g_on_error_query">
     <leak-ignore/>
     <noreturn>false</noreturn>