diff --git a/Marlin/src/gcode/feature/input_shaping/M593.cpp b/Marlin/src/gcode/feature/input_shaping/M593.cpp
index 040710f3e5..aafabb3cb7 100644
--- a/Marlin/src/gcode/feature/input_shaping/M593.cpp
+++ b/Marlin/src/gcode/feature/input_shaping/M593.cpp
@@ -72,13 +72,13 @@ void GcodeSuite::M593() {
 
   if (parser.seen('F')) {
     const float freq = parser.value_float();
-    constexpr float max_freq = float(uint32_t(STEPPER_TIMER_RATE) / 2) / shaping_time_t(-2);
-    if (freq == 0.0f || freq > max_freq) {
+    constexpr float min_freq = float(uint32_t(STEPPER_TIMER_RATE) / 2) / shaping_time_t(-2);
+    if (freq == 0.0f || freq > min_freq) {
       if (for_X) stepper.set_shaping_frequency(X_AXIS, freq);
       if (for_Y) stepper.set_shaping_frequency(Y_AXIS, freq);
     }
     else
-      SERIAL_ECHOLNPGM("?Frequency (F) must be greater than ", max_freq, " or 0 to disable");
+      SERIAL_ECHOLNPGM("?Frequency (F) must be greater than ", min_freq, " or 0 to disable");
   }
 }