diff --git a/ChangeLog b/ChangeLog
index 84b5e73a7b..4687ecab4c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-10-22  Stefan Kost  <ensonic@users.sf.net>
+
+	* docs/pwg/building-boiler.xml:
+      exchanged GTK_ macros with G_TYPE macros (as pointed out by mathrick)
+
 2004-10-19  Wim Taymans  <wim at fluendo dot com>
 
 	* gst/parse/parse.l:
diff --git a/docs/pwg/building-boiler.xml b/docs/pwg/building-boiler.xml
index 8773102dfe..cd24bc92b6 100644
--- a/docs/pwg/building-boiler.xml
+++ b/docs/pwg/building-boiler.xml
@@ -155,13 +155,13 @@ U gst-template/gst-app/src/Makefile.am
   #define GST_TYPE_EXAMPLE \
     (gst_example_get_type())
   #define GST_EXAMPLE(obj) \
-    (GTK_CHECK_CAST((obj),GST_TYPE_EXAMPLE,GstExample))
+    (G_TYPE_CHECK_CAST((obj),GST_TYPE_EXAMPLE,GstExample))
   #define GST_EXAMPLE_CLASS(klass) \
-    (GTK_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample))
+    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample))
   #define GST_IS_EXAMPLE(obj) \
-    (GTK_CHECK_TYPE((obj),GST_TYPE_EXAMPLE))
+    (G_TYPE_CHECK_TYPE((obj),GST_TYPE_EXAMPLE))
   #define GST_IS_EXAMPLE_CLASS(obj) \
-    (GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE))
+    (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE))
 
   /* Standard function returning type information. */
   GType gst_example_get_type (void);