diff --git a/dlib/image_loader/load_image.h b/dlib/image_loader/load_image.h
index 6b1254735..2a735576e 100644
--- a/dlib/image_loader/load_image.h
+++ b/dlib/image_loader/load_image.h
@@ -66,6 +66,7 @@ namespace dlib
 #ifdef DLIB_JPEG_SUPPORT
             case image_file_type::JPG: load_jpeg(image, file_name); return;
 #endif
+            default:  ;
         }
 
         if (im_type == image_file_type::JPG)