diff --git a/project/config/cfgdefs.in b/project/config/cfgdefs.in
index 7656eed..e771972 100644
--- a/project/config/cfgdefs.in
+++ b/project/config/cfgdefs.in
@@ -1 +1,2 @@
+# pycompile
 PYCOMPILE_CFGHOST	= @pycompile_cfghost@
diff --git a/project/config/cfgdefs.sh b/project/config/cfgdefs.sh
index 62a4d21..a818f0c 100644
--- a/project/config/cfgdefs.sh
+++ b/project/config/cfgdefs.sh
@@ -57,6 +57,7 @@ mb_cfgdefs_cflags=$(make -s -f Makefile.tmp .display-cflags)
 
 printf '\n\n#system tests: target\n' >> $mb_pwd/cfgdefs.mk
 
+# <stropts.h>
 $mb_cfgdefs_cc $mb_cfgdefs_cflags -E -xc - \
 	--include=stropts.h < /dev/null    \
 	> /dev/null 2>/dev/null ||         \