diff --git a/gl_compositor.h b/gl_compositor.h
index 528d8ac..450ca67 100644
--- a/gl_compositor.h
+++ b/gl_compositor.h
@@ -48,7 +48,7 @@
   int BeginContext();
   int EndContext();
   int GenerateShaders();
-  int DoComposition(const GLComposition &composition);
+  int DoComposition(GLComposition *composition);
   int DoFenceWait(int acquireFenceFd);
   int CreateTextureFromHandle(buffer_handle_t handle,
                               struct texture_from_handle *tex);