diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index e756f3c85..d5c55b2ca 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -49,6 +49,8 @@
   <define name="G_DEFINE_DYNAMIC_TYPE_EXTENDED(TN, t_n, T_P, _f_, _C_)" value=""/>
   <define name="G_DEFINE_BOXED_TYPE(TypeName,type_name,copy_func,free_func)" value=""/>
   <define name="G_DEFINE_BOXED_TYPE_WITH_CODE(TypeName,type_name,copy_func,free_func,_C_)" value=""/>
+  <define name="G_BEGIN_DECLS" value=""/>
+  <define name="G_END_DECLS" value=""/>
   <define name="G_ADD_PRIVATE(TypeName)" value=""/>
   <define name="G_PRIVATE_OFFSET(TypeName, field)" value=""/>
   <define name="G_PRIVATE_FIELD(TypeName, inst, field_type, field_name)" value=""/>