diff --git a/Marlin/src/core/debug_out.h b/Marlin/src/core/debug_out.h
index fc6fe715f4..df492fe03e 100644
--- a/Marlin/src/core/debug_out.h
+++ b/Marlin/src/core/debug_out.h
@@ -36,6 +36,7 @@
 #undef DEBUG_ECHOLN
 #undef DEBUG_ECHOPGM
 #undef DEBUG_ECHOPGM_P
+#undef DEBUG_ECHOLNPGM
 #undef DEBUG_ECHOLNPGM_P
 #undef DEBUG_ECHOPAIR
 #undef DEBUG_ECHOPAIR_P
@@ -62,6 +63,7 @@
   #define DEBUG_ECHOLN            SERIAL_ECHOLN
   #define DEBUG_ECHOPGM           SERIAL_ECHOPGM
   #define DEBUG_ECHOPGM_P         SERIAL_ECHOPGM_P
+  #define DEBUG_ECHOLNPGM         SERIAL_ECHOLNPGM
   #define DEBUG_ECHOLNPGM_P       SERIAL_ECHOLNPGM_P
   #define DEBUG_ECHOPAIR          SERIAL_ECHOPAIR
   #define DEBUG_ECHOPAIR_P        SERIAL_ECHOPAIR_P