diff --git a/plugins/nginx-vhosts/functions b/plugins/nginx-vhosts/functions
index 19503179298..74f6cd93142 100755
--- a/plugins/nginx-vhosts/functions
+++ b/plugins/nginx-vhosts/functions
@@ -226,6 +226,7 @@ nginx_build_config() {
 
   CUSTOM_NGINX_TEMPLATE="$(plugn trigger nginx-app-template-source "$APP" "app-config")"
   if [[ -n "$CUSTOM_NGINX_TEMPLATE" ]]; then
+    local NGINX_TEMPLATE_SOURCE="plugin-supplied"
     NGINX_TEMPLATE="$CUSTOM_NGINX_TEMPLATE"
   fi
 
diff --git a/plugins/nginx-vhosts/internal-functions b/plugins/nginx-vhosts/internal-functions
index f2a752d55e1..92455ee1e9a 100755
--- a/plugins/nginx-vhosts/internal-functions
+++ b/plugins/nginx-vhosts/internal-functions
@@ -460,9 +460,13 @@ fn-nginx-vhosts-manage-hsts() {
   local HSTS_PRELOAD="$(fn-nginx-computed-hsts-preload "$APP")"
   local NGINX_HSTS_CONF="$DOKKU_ROOT/$APP/nginx.conf.d/hsts.conf"
   local HSTS_TEMPLATE="$PLUGIN_AVAILABLE_PATH/nginx-vhosts/templates/hsts.conf.sigil"
+  local NGINX_TEMPLATE_SOURCE="built-in"
+  local is_custom_hsts_template=false
 
   CUSTOM_HSTS_TEMPLATE="$(plugn trigger nginx-app-template-source "$APP" "hsts-config")"
   if [[ -n "$CUSTOM_HSTS_TEMPLATE" ]]; then
+    is_custom_hsts_template=true
+    NGINX_TEMPLATE_SOURCE="plugin-supplied"
     HSTS_TEMPLATE="$CUSTOM_HSTS_TEMPLATE"
   fi
 
@@ -471,7 +475,7 @@ fn-nginx-vhosts-manage-hsts() {
     return
   fi
 
-  dokku_log_verbose_quiet "Enabling HSTS"
+  dokku_log_verbose_quiet "Enabling HSTS (using $NGINX_TEMPLATE_SOURCE template)"
   local HSTS_HEADERS=""
   if [[ -n "$HSTS_MAX_AGE" ]]; then
     HSTS_HEADERS="max-age=$HSTS_MAX_AGE"