diff --git a/generate_graphs.py b/generate_graphs.py
index f5ee95f..e665c66 100755
--- a/generate_graphs.py
+++ b/generate_graphs.py
@@ -40,10 +40,12 @@ def graph(output: Path, rrd: Path, start: str, title: str, unit: str,
         args += ["--lower-limit", "0", "--upper-limit", "100", "--rigid"]
     if thermal_mixed:
         args += ["--lower-limit", "0", "--upper-limit", "100", "--rigid"]
-    if any(ds.startswith("health_") for ds, _label, _cf in series):
+    health_graph = any(ds.startswith("health_") for ds, _label, _cf in series)
+    if health_graph:
         args += ["--lower-limit", "0", "--upper-limit", "10", "--rigid",
                  "HRULE:5#9CA3AF:action threshold",
-                 "HRULE:3#DC2626:urgent threshold"]
+                 "HRULE:3#DC2626:urgent threshold",
+                 "COMMENT:\\n"]
     value_suffix = "%%" if unit == "%" else ""
     for index, (ds, label, cf) in enumerate(series):
         var = f"v{index}"