diff --git a/Marlin/src/module/planner.h b/Marlin/src/module/planner.h
index c226625a30..ee3a243f01 100644
--- a/Marlin/src/module/planner.h
+++ b/Marlin/src/module/planner.h
@@ -261,6 +261,7 @@ typedef struct PlannerBlock {
              final_adv_steps;               // Advance steps for exit speed pressure
   #endif
 
+  #define MINIMAL_STEP_RATE 120              // to prevent timer overflow?
   uint32_t nominal_rate,                    // The nominal step rate for this block in step_events/sec
            initial_rate,                    // The jerk-adjusted step rate at start of block
            final_rate,                      // The minimal rate at exit