diff --git a/sh/main.sh b/sh/main.sh
index dbba6c3..b8ed82d 100644
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -32,7 +32,7 @@ _sh_ifs_pop() {
 }
 
 _rwx_main_log() {
-	if sh_shell_interactive; then
+	if rwx_shell_interactive; then
 		[ ${#} -gt 0 ] || set -- ""
 		local line
 		for line in "${@}"; do
@@ -84,7 +84,7 @@ rwx_help() {
 }
 
 # test if active shell is in interactive mode
-sh_shell_interactive() {
+rwx_shell_interactive() {
 	case "${-}" in
 	*i*) ;;
 	*) return 1 ;;
@@ -131,7 +131,7 @@ rwx_main() {
 	# user root
 	rwx_main_source "${SH_USER}"
 	# run interactive extras
-	if sh_shell_interactive; then
+	if rwx_shell_interactive; then
 		# check format
 		sh_log
 		rwx_shfmt_check "${SH_ROOT}"