diff --git a/npm_install.py b/npm_install.py
index 719b555..ca9819b 100644
--- a/npm_install.py
+++ b/npm_install.py
@@ -1533,7 +1533,7 @@ def write_metrics_files():
 
     """Create /etc/angie/metrics.conf (port 82/8282 with console & status)."""
     with step("Adding Angie metrics & console on :82 / :8282 (https)"):
-        metrics = """include /etc/angie/prometheus_all.conf;
+        metrics = f"""include /etc/angie/prometheus_all.conf;
 server {
     listen 8282 ssl;
     http2 on;