diff --git a/main.rkt b/main.rkt
index a2c66db..e8f48f1 100644
--- a/main.rkt
+++ b/main.rkt
@@ -1,7 +1,7 @@
 #lang racket/base
 (require pollen/main-base)
-(define+provide-module-begin-in-mode world:mode-preproc)
+(define+provide-module-begin-in-mode world:mode-preproc) ; because default mode in submodule is preproc
 
 (module reader racket/base
   (require pollen/reader-base)
-  (define+provide-reader-in-mode world:mode-auto))
\ No newline at end of file
+  (define+provide-reader-in-mode world:mode-auto)) ; because default mode in file is auto
\ No newline at end of file