diff --git a/docs/gst/gstreamer-sections.txt b/docs/gst/gstreamer-sections.txt
index 448898377c..361ed23a0a 100644
--- a/docs/gst/gstreamer-sections.txt
+++ b/docs/gst/gstreamer-sections.txt
@@ -1263,6 +1263,7 @@ GST_MINI_OBJECT_GET_CLASS
 GST_TYPE_MINI_OBJECT
 GST_TYPE_MINI_OBJECT_FLAGS
 GST_MINI_OBJECT_CAST
+GST_MINI_OBJECT_CONST_CAST
 
 GST_IS_PARAM_SPEC_MINI_OBJECT
 GST_PARAM_SPEC_MINI_OBJECT
diff --git a/gst/gstbuffer.h b/gst/gstbuffer.h
index 44c32109e9..730ff81bd6 100644
--- a/gst/gstbuffer.h
+++ b/gst/gstbuffer.h
@@ -380,7 +380,7 @@ G_INLINE_FUNC GstBuffer * gst_buffer_copy (const GstBuffer * buf);
 static inline GstBuffer *
 gst_buffer_copy (const GstBuffer * buf)
 {
-  return GST_BUFFER (gst_mini_object_copy (GST_MINI_OBJECT_CAST (buf)));
+  return GST_BUFFER (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (buf)));
 }
 
 
diff --git a/gst/gstbufferlist.h b/gst/gstbufferlist.h
index c75a07b3ea..635817e017 100644
--- a/gst/gstbufferlist.h
+++ b/gst/gstbufferlist.h
@@ -179,7 +179,7 @@ G_INLINE_FUNC GstBufferList * gst_buffer_list_copy (const GstBufferList * list);
 static inline GstBufferList *
 gst_buffer_list_copy (const GstBufferList * list)
 {
-  return GST_BUFFER_LIST_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (list)));
+  return GST_BUFFER_LIST_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (list)));
 }
 
 /**
diff --git a/gst/gstevent.h b/gst/gstevent.h
index 6fc809fa48..7ee460d533 100644
--- a/gst/gstevent.h
+++ b/gst/gstevent.h
@@ -400,7 +400,7 @@ G_INLINE_FUNC GstEvent * gst_event_copy (const GstEvent * event);
 static inline GstEvent *
 gst_event_copy (const GstEvent * event)
 {
-  return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (event)));
+  return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
 }
 
 
diff --git a/gst/gstmessage.h b/gst/gstmessage.h
index 83c280f005..d845c32972 100644
--- a/gst/gstmessage.h
+++ b/gst/gstmessage.h
@@ -341,7 +341,7 @@ G_INLINE_FUNC GstMessage * gst_message_copy (const GstMessage * msg);
 static inline GstMessage *
 gst_message_copy (const GstMessage * msg)
 {
-  return GST_MESSAGE_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (msg)));
+  return GST_MESSAGE_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (msg)));
 }
 
 /**
diff --git a/gst/gstminiobject.h b/gst/gstminiobject.h
index da05a31411..9bb56d6dec 100644
--- a/gst/gstminiobject.h
+++ b/gst/gstminiobject.h
@@ -36,6 +36,7 @@ G_BEGIN_DECLS
 #define GST_MINI_OBJECT(obj)          (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MINI_OBJECT, GstMiniObject))
 #define GST_MINI_OBJECT_CLASS(klass)  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MINI_OBJECT, GstMiniObjectClass))
 #define GST_MINI_OBJECT_CAST(obj)     ((GstMiniObject*)(obj))
+#define GST_MINI_OBJECT_CONST_CAST(obj) ((const GstMiniObject*)(obj))
 
 typedef struct _GstMiniObject GstMiniObject;
 typedef struct _GstMiniObjectClass GstMiniObjectClass;
diff --git a/gst/gstquery.h b/gst/gstquery.h
index ae9b07bc86..7077dc650d 100644
--- a/gst/gstquery.h
+++ b/gst/gstquery.h
@@ -237,7 +237,7 @@ G_INLINE_FUNC GstQuery * gst_query_copy (const GstQuery * q);
 static inline GstQuery *
 gst_query_copy (const GstQuery * q)
 {
-  return GST_QUERY_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (q)));
+  return GST_QUERY_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (q)));
 }
 
 /**
diff --git a/gst/gstutils.h b/gst/gstutils.h
index f91b77749a..fad4ff56b5 100644
--- a/gst/gstutils.h
+++ b/gst/gstutils.h
@@ -270,7 +270,7 @@ GST_BOILERPLATE_FULL (type, type_as_function, parent_type,              \
 
 /* Define PUT and GET functions for unaligned memory */
 #define _GST_GET(__data, __idx, __size, __shift) \
-    (((guint##__size) (((guint8 *) (__data))[__idx])) << (__shift))
+    (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
 
 #define _GST_PUT(__data, __idx, __size, __shift, __num) \
     (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
diff --git a/libs/gst/base/gstbytewriter.h b/libs/gst/base/gstbytewriter.h
index 743e9dbcd2..fe1881fb79 100644
--- a/libs/gst/base/gstbytewriter.h
+++ b/libs/gst/base/gstbytewriter.h
@@ -94,17 +94,17 @@ GstBuffer *gst_byte_writer_reset_and_get_buffer (GstByteWriter *writer);
  */
 #ifdef _FOOL_GTK_DOC_
 G_INLINE_FUNC guint gst_byte_writer_get_pos (const GstByteWriter *writer);
-G_INLINE_FUNC gboolean gst_byte_writer_set_pos (const GstByteWriter *writer, guint pos);
+G_INLINE_FUNC gboolean gst_byte_writer_set_pos (GstByteWriter *writer, guint pos);
 G_INLINE_FUNC guint gst_byte_writer_get_size (const GstByteWriter *writer);
 #else
 static inline guint
 gst_byte_writer_get_pos (const GstByteWriter *writer)
 {
-  return gst_byte_reader_get_pos (GST_BYTE_READER (writer));
+  return gst_byte_reader_get_pos ((const GstByteReader *) writer);
 }
 
 static inline gboolean
-gst_byte_writer_set_pos (const GstByteWriter *writer, guint pos)
+gst_byte_writer_set_pos (GstByteWriter *writer, guint pos)
 {
   return gst_byte_reader_set_pos (GST_BYTE_READER (writer), pos);
 }
@@ -112,7 +112,7 @@ gst_byte_writer_set_pos (const GstByteWriter *writer, guint pos)
 static inline guint
 gst_byte_writer_get_size (const GstByteWriter *writer)
 {
-  return gst_byte_reader_get_size (GST_BYTE_READER (writer));
+  return gst_byte_reader_get_size ((const GstByteReader *) writer);
 }
 #endif