diff --git a/opnsense-config/src/modules/node_exporter.rs b/opnsense-config/src/modules/node_exporter.rs
index 9a44876..fd7ee5c 100644
--- a/opnsense-config/src/modules/node_exporter.rs
+++ b/opnsense-config/src/modules/node_exporter.rs
@@ -20,21 +20,20 @@ impl<'a> NodeExporterConfig<'a> {
     pub fn get_full_config(&self) -> &Option<NodeExporter> {
         &self.opnsense.opnsense.node_exporter
     }
-    fn with_node_exporter<F, R>(&mut self, f: F) -> R
+
+    fn with_node_exporter<F, R>(&mut self, f: F) -> Result<R, &'static str>
     where
         F: FnOnce(&mut NodeExporter) -> R,
     {
         match &mut self.opnsense.opnsense.node_exporter.as_mut() {
-            Some(node_exporter) => f(node_exporter),
-            None => unimplemented!(
-                "
-                node exporter is not yet installed"
-            ),
+            Some(node_exporter) => Ok(f(node_exporter)),
+            None => Err("node exporter is not yet installed"),
         }
     }
 
-    pub fn enable(&mut self, enabled: bool) {
+    pub fn enable(&mut self, enabled: bool) -> Result<(), &'static str> {
         self.with_node_exporter(|node_exporter| node_exporter.enabled = enabled as u8)
+            .map(|_| ())
     }
 
     pub async fn reload_restart(&self) -> Result<(), Error> {