diff --git a/libweston/compositor.c b/libweston/compositor.c
index 2ca3da3b4..e867ec1e5 100644
--- a/libweston/compositor.c
+++ b/libweston/compositor.c
@@ -3798,7 +3798,7 @@ weston_surface_get_bounding_box(struct weston_surface *surface)
  * The rectangle defined by src_x, src_y, width, height must fit in
  * the surface contents. Otherwise an error is returned.
  *
- * Use surface_get_data_size to determine the content size; the
+ * Use weston_surface_get_content_size to determine the content size; the
  * needed target buffer size and rectangle limits.
  *
  * CURRENT IMPLEMENTATION RESTRICTIONS: