diff --git a/sys/d3d11/gstd3d11memory.c b/sys/d3d11/gstd3d11memory.c
index 0350d0f5e0..99a47227f7 100644
--- a/sys/d3d11/gstd3d11memory.c
+++ b/sys/d3d11/gstd3d11memory.c
@@ -403,3 +403,10 @@ error:
     gst_d3d11_device_release_texture (device, staging);
   return NULL;
 }
+
+gboolean
+gst_is_d3d11_memory (GstMemory * mem)
+{
+  return mem != NULL && mem->allocator != NULL &&
+      GST_IS_D3D11_ALLOCATOR (mem->allocator);
+}
diff --git a/sys/d3d11/gstd3d11memory.h b/sys/d3d11/gstd3d11memory.h
index 406dd1ec44..4ebe8e449d 100644
--- a/sys/d3d11/gstd3d11memory.h
+++ b/sys/d3d11/gstd3d11memory.h
@@ -87,9 +87,9 @@ struct _GstD3D11Allocator
 {
   GstAllocator parent;
 
-  /*< private >*/
   GstD3D11Device *device;
 
+  /*< private >*/
   gpointer _gst_reserved[GST_PADDING];
 };
 
@@ -118,6 +118,9 @@ GstD3D11Allocator * gst_d3d11_allocator_new       (GstD3D11Device *device);
 GstMemory *         gst_d3d11_allocator_alloc     (GstD3D11Allocator * allocator,
                                                    GstD3D11AllocationParams * params);
 
+gboolean            gst_is_d3d11_memory           (GstMemory * mem);
+
+
 G_END_DECLS
 
 #endif /* __GST_D3D11_MEMORY_H__ */