diff --git a/src/skia/cairo-skia-surface.cpp b/src/skia/cairo-skia-surface.cpp
index de94f3a65..71bebb0c3 100644
--- a/src/skia/cairo-skia-surface.cpp
+++ b/src/skia/cairo-skia-surface.cpp
@@ -175,6 +175,7 @@ cairo_skia_surface_backend = {
     _cairo_skia_surface_map_to_image,
     _cairo_skia_surface_unmap_image,
 
+    _cairo_surface_default_source,
     _cairo_skia_surface_acquire_source_image,
     _cairo_skia_surface_release_source_image,
     NULL, /* snapshot */