diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 7de467fa6..c99953a03 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -8445,6 +8445,7 @@ inline void gcode_M114() {
   static void cap_line(const char * const name, bool ena=false) {
     SERIAL_PROTOCOLPGM("Cap:");
     serialprintPGM(name);
+    SERIAL_PROTOCOLPGM(":");
     SERIAL_PROTOCOLLN(int(ena ? 1 : 0));
   }
 #endif