diff --git a/source/blender/editors/include/ED_view3d.hh b/source/blender/editors/include/ED_view3d.hh
index b0d41ed5db3..bdef261cc54 100644
--- a/source/blender/editors/include/ED_view3d.hh
+++ b/source/blender/editors/include/ED_view3d.hh
@@ -826,10 +826,6 @@ float ED_view3d_radius_to_dist(const View3D *v3d,
                                bool use_aspect,
                                float radius);
 
-/**
- * Back-buffer select and draw support.
- */
-void ED_view3d_backbuf_depth_validate(ViewContext *vc);
 /**
  * allow for small values [0.5 - 2.5],
  * and large values, FLT_MAX by clamping by the area size