diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 9ccd1de14d3c2f79dda7a12692faf35189993d87..07db02ab49a4e98146c1bae751d2076fc642fd15 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -312,7 +312,8 @@ void PID_autotune(float temp, int extruder, int ncycles)
         }
       } 
     }
-    if (input > temp + 20) {
+    #define MAX_OVERSHOOT_PID_AUTOTUNE 20
+    if (input > temp + MAX_OVERSHOOT_PID_AUTOTUNE) {
       SERIAL_PROTOCOLLNPGM(MSG_PID_TEMP_TOO_HIGH);
       return;
     }