diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 31f94f7..e3e1dd7 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -8553,7 +8553,7 @@ inline void gcode_M109() {
   #endif
   
   // flush the serial buffer after heating to prevent lockup by m105
-  flush_and_request_resend();
+  SERIAL_FLUSH();
 
 }
 
@@ -8708,7 +8708,7 @@ inline void gcode_M109() {
     #endif
     
      // flush the serial buffer after heating to prevent lockup by m105
-     flush_and_request_resend();
+     SERIAL_FLUSH();
   }
 
 #endif // HAS_HEATED_BED