diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index eb33589d9..38b1ac39a 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3648,6 +3648,7 @@ inline void gcode_M111() {
       setTargetHotend(0, cur_hotend);
     }
   }
+  SERIAL_EOL;
 }
 
 /**