diff --git a/monitor/fan.cpp b/monitor/fan.cpp
index fa8b392..7bd1542 100644
--- a/monitor/fan.cpp
+++ b/monitor/fan.cpp
@@ -506,7 +506,7 @@
     }
 }
 
-void Fan::powerStateChanged(bool powerStateOn)
+void Fan::powerStateChanged([[maybe_unused]] bool powerStateOn)
 {
 #ifdef MONITOR_USE_JSON
     if (powerStateOn)