diff --git a/scripts/install b/scripts/install
index 96d76ff..93245d5 100755
--- a/scripts/install
+++ b/scripts/install
@@ -17,7 +17,7 @@ source /usr/share/yunohost/helpers
 bot_synapse_adm=true
 encryption=false
 
-if [[ -z "${botusers}" ]] || [ "$botusers" == "admin" ]; then
+if [[ -z "$botusers" ]] || [ "$botusers" == "admin" ]; then
     if_botusers="# "
 else
     if_botusers=""
diff --git a/scripts/upgrade b/scripts/upgrade
index 6af3ff0..ff3b0da 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -49,6 +49,12 @@ chown -R "$app:$app" "$install_dir"
 #=================================================
 ynh_script_progression --message="Updating a configuration file..." --weight=2
 
+if [[ -z "$botusers" ]] || [ "$botusers" == "admin" ]; then
+    if_botusers="# "
+else
+    if_botusers=""
+fi
+
 ynh_add_config --template="config.yaml" --destination="$install_dir/config.yaml"
 
 chmod 400 "$install_dir/config.yaml"