diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 1f6a826d29..5e9945c7a1 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -1070,6 +1070,10 @@ inline void get_serial_commands() {
 
         gcode_LastN = gcode_N;
       }
+      else if (card.saving) {
+        gcode_line_error(PSTR(MSG_ERR_NO_CHECKSUM));
+        return;
+      }
 
       // Movement commands alert when stopped
       if (IsStopped()) {