diff --git a/dlib/image_transforms/image_pyramid_abstract.h b/dlib/image_transforms/image_pyramid_abstract.h
index a61b275fd..ebd928c7c 100644
--- a/dlib/image_transforms/image_pyramid_abstract.h
+++ b/dlib/image_transforms/image_pyramid_abstract.h
@@ -115,7 +115,7 @@ namespace dlib
         /*!
             ensures
                 - returns drectangle(point_down(rect.tl_corner()), point_down(rect.br_corner()));
-                  (i.e. maps rect into a downsampled)
+                  (i.e. maps rect into a downsampled image)
         !*/
 
         drectangle rect_up (