diff --git a/src/compositor/meta-window-actor-x11.c b/src/compositor/meta-window-actor-x11.c
index 4f825fb39..a046d33c1 100644
--- a/src/compositor/meta-window-actor-x11.c
+++ b/src/compositor/meta-window-actor-x11.c
@@ -859,7 +859,12 @@ build_and_scan_frame_mask (MetaWindowActorX11 *actor_x11,
       region_to_cairo_path (frame_paint_region, cr);
       cairo_clip (cr);
 
-      meta_frame_get_mask (window->frame, &frame_rect, cr);
+      cairo_rectangle (cr,
+                       0, 0,
+                       window->frame->rect.width,
+                       window->frame->rect.height);
+      cairo_set_source_rgb (cr, 0, 0, 0);
+      cairo_fill (cr);
 
       cairo_surface_flush (image);
       scanned_region = scan_visible_region (mask_data, stride, frame_paint_region);
diff --git a/src/core/frame.c b/src/core/frame.c
index 941768570..914b144b8 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -413,23 +413,6 @@ meta_frame_get_frame_bounds (MetaFrame *frame)
   return bounds;
 }
 
-void
-meta_frame_get_mask (MetaFrame    *frame,
-                     MtkRectangle *frame_rect,
-                     cairo_t      *cr)
-{
-  MetaFrameBorders borders;
-
-  meta_frame_calc_borders (frame, &borders);
-
-  cairo_rectangle (cr,
-                   0, 0,
-                   frame->rect.width,
-                   frame->rect.height);
-  cairo_set_source_rgb (cr, 0, 0, 0);
-  cairo_fill (cr);
-}
-
 Window
 meta_frame_get_xwindow (MetaFrame *frame)
 {
diff --git a/src/core/frame.h b/src/core/frame.h
index 240e4edfa..de1ce909b 100644
--- a/src/core/frame.h
+++ b/src/core/frame.h
@@ -69,10 +69,6 @@ void meta_frame_clear_cached_borders (MetaFrame *frame);
 
 MtkRegion *meta_frame_get_frame_bounds (MetaFrame *frame);
 
-void meta_frame_get_mask (MetaFrame    *frame,
-                          MtkRectangle *frame_rect,
-                          cairo_t      *cr);
-
 gboolean meta_frame_handle_xevent (MetaFrame *frame,
                                    XEvent    *event);