diff --git a/sh/debian.sh b/sh/debian.sh
index a345b08..feeb8ac 100644
--- a/sh/debian.sh
+++ b/sh/debian.sh
@@ -71,6 +71,6 @@ apt_upgrade() {
 	apt_clean
 }
 
-debian_frontend_disable() {
+sh_debian_frontend_disable() {
 	export DEBIAN_FRONTEND="noninteractive"
 }
diff --git a/sh/rescue/common.sh b/sh/rescue/common.sh
index d94616b..69aded0 100644
--- a/sh/rescue/common.sh
+++ b/sh/rescue/common.sh
@@ -19,7 +19,7 @@ fr_FR.UTF-8 UTF-8
 	# update catalog
 	apt_update
 	# disable frontend
-	debian_frontend_disable
+	sh_debian_frontend_disable
 	# install backports
 	apt_install_backports "tmux"
 	# install packages
@@ -32,7 +32,7 @@ rescue_install() {
 	# update catalog
 	apt_update
 	# disable frontend
-	debian_frontend_disable
+	sh_debian_frontend_disable
 	# upgrade packages
 	apt_upgrade
 	# install packages