diff --git a/sonoff/xdrv_11_knx.ino b/sonoff/xdrv_11_knx.ino
index 477321705..76fc1cf0c 100644
--- a/sonoff/xdrv_11_knx.ino
+++ b/sonoff/xdrv_11_knx.ino
@@ -21,7 +21,7 @@
 /*********************************************************************************************\
  * KNX support
  *
- * Using library:
+ * Using libraries:
  *   ESP KNX IP library (https://github.com/envy/esp-knx-ip)
 
 Constants in sonoff.h