diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 6425c5c5a..d23b3ec98 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -7477,7 +7477,7 @@ inline void gcode_M42() {
   inline void gcode_M49() {
     g26_debug_flag ^= true;
     SERIAL_PROTOCOLPGM("G26 Debug ");
-    serialprintPGM(g26_debug_flag ? PSTR("on.") : PSTR("off."));
+    serialprintPGM(g26_debug_flag ? PSTR("on.\n") : PSTR("off.\n"));
   }
 
 #endif // G26_MESH_VALIDATION