diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index db7ba60..3732105 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -1245,7 +1245,7 @@
 //
 #define HOST_KEEPALIVE_FEATURE        // Disable this if your host doesn't like keepalive messages
 #define DEFAULT_KEEPALIVE_INTERVAL 2  // Number of seconds between "busy" messages. Set with M113.
-//#define BUSY_WHILE_HEATING            // Some hosts require "busy" messages even during heating
+#define BUSY_WHILE_HEATING            // Some hosts require "busy" messages even during heating
 
 //
 // M100 Free Memory Watcher