diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 2da759ab3c..043e486d5d 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -1183,7 +1183,7 @@
   //#define FTM_SMOOTHING                       // Smoothing can reduce artifacts and make steppers quieter
                                                 // on sharp corners, but too much will round corners.
   #if ENABLED(FTM_SMOOTHING)
-    #define FTM_MAX_SMOOTHING_TIME      0.10f   // Maximum smoothing time (seconds), higher consumes more RAM.
+    #define FTM_MAX_SMOOTHING_TIME      0.10f   // (s) Maximum smoothing time. Higher values consume more RAM.
                                                 // Increase smoothing time to reduce jerky motion, ghosting and noises.
     #define FTM_SMOOTHING_TIME_X        0.00f   // (s) Smoothing time for X axis. Zero means disabled.
     #define FTM_SMOOTHING_TIME_Y        0.00f   // (s) Smoothing time for Y axis