diff --git a/moo/lib/opt-imp.h b/moo/lib/opt-imp.h
index ad3a160..0d56353 100644
--- a/moo/lib/opt-imp.h
+++ b/moo/lib/opt-imp.h
@@ -27,10 +27,6 @@
 
 /* this file is supposed to be included by opt.c multiple times */
 
-
-#include <moo-opt.h>
-#include <moo-utl.h>
-
 /* 
  * moo_getopt is based on BSD getopt.
  * --------------------------------------------------------------------------
diff --git a/moo/lib/std.c b/moo/lib/std.c
index 87b6587..2fe9662 100644
--- a/moo/lib/std.c
+++ b/moo/lib/std.c
@@ -4229,10 +4229,12 @@ moo_t* moo_openstd (moo_oow_t xtnsize, const moo_cfgstd_t* cfg, moo_errinf_t* er
 
 #if defined(EMSCRIPTEN)
 {
+/* TODO: this is experimental. make it proper */
 moo_bitmask_t m = ~(moo_bitmask_t)0;
 moo_setoption (moo, MOO_OPTION_LOG_MASK, &m);
 }
 #endif
+
 	{
 		moo_bitmask_t bm = 0;