diff --git a/ChangeLog b/ChangeLog
index 3939bfe3e2..ebb1c0d232 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2008-03-24  Wim Taymans  <wim.taymans@collabora.co.uk>
+
+	Patch by:  José Alburquerque <jaalburqu at svn dot gnome dot org>
+
+	* gst/gstcaps.c: (gst_caps_set_simple),
+	(gst_caps_set_simple_valist), (gst_caps_intersect):
+	* gst/gstcaps.h:
+	Constify the field gchar * params in set_simple and friends.
+	Fixes #522326.
+
 2008-03-24  Wim Taymans  <wim.taymans@collabora.co.uk>
 
 	* gst/gstvalue.c: (gst_value_transform_object_string):
diff --git a/gst/gstcaps.c b/gst/gstcaps.c
index fd330f51dc..501530c65d 100644
--- a/gst/gstcaps.c
+++ b/gst/gstcaps.c
@@ -863,7 +863,7 @@ gst_caps_truncate (GstCaps * caps)
  * manner as gst_structure_set(), and be NULL-terminated.
  */
 void
-gst_caps_set_simple (GstCaps * caps, char *field, ...)
+gst_caps_set_simple (GstCaps * caps, const char *field, ...)
 {
   GstStructure *structure;
   va_list var_args;
@@ -890,7 +890,7 @@ gst_caps_set_simple (GstCaps * caps, char *field, ...)
  * manner as gst_structure_set(), and be NULL-terminated.
  */
 void
-gst_caps_set_simple_valist (GstCaps * caps, char *field, va_list varargs)
+gst_caps_set_simple_valist (GstCaps * caps, const char *field, va_list varargs)
 {
   GstStructure *structure;
 
diff --git a/gst/gstcaps.h b/gst/gstcaps.h
index 8d8d22f628..d71dd750f3 100644
--- a/gst/gstcaps.h
+++ b/gst/gstcaps.h
@@ -208,9 +208,9 @@ GstStructure *    gst_caps_get_structure           (const GstCaps *caps,
 GstCaps *         gst_caps_copy_nth                (const GstCaps *caps, guint nth);
 void              gst_caps_truncate                (GstCaps       *caps);
 void              gst_caps_set_simple              (GstCaps       *caps,
-                                                    char          *field, ...) G_GNUC_NULL_TERMINATED;
+                                                    const char    *field, ...) G_GNUC_NULL_TERMINATED;
 void              gst_caps_set_simple_valist       (GstCaps       *caps,
-                                                    char          *field,
+                                                    const char    *field,
                                                     va_list        varargs);
 
 /* tests */