diff --git a/gst/gstbuffer.c b/gst/gstbuffer.c
index 75642e1b60..9d4421d349 100644
--- a/gst/gstbuffer.c
+++ b/gst/gstbuffer.c
@@ -476,7 +476,7 @@ gst_buffer_new (void)
  *     be allocated.
  */
 GstBuffer *
-gst_buffer_new_allocate (GstMemoryAllocator * allocator, gsize size,
+gst_buffer_new_allocate (const GstMemoryAllocator * allocator, gsize size,
     gsize align)
 {
   GstBuffer *newbuf;
diff --git a/gst/gstbuffer.h b/gst/gstbuffer.h
index c11edd279b..0b3b170043 100644
--- a/gst/gstbuffer.h
+++ b/gst/gstbuffer.h
@@ -226,7 +226,7 @@ struct _GstBuffer {
 
 /* allocation */
 GstBuffer * gst_buffer_new                 (void);
-GstBuffer * gst_buffer_new_allocate        (GstMemoryAllocator * allocator, gsize maxsize, gsize align);
+GstBuffer * gst_buffer_new_allocate        (const GstMemoryAllocator * allocator, gsize maxsize, gsize align);
 
 /* memory blocks */
 guint       gst_buffer_n_memory            (GstBuffer *buffer);