diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h
index 86d4bb033..b0537162e 100644
--- a/Marlin/Marlin.h
+++ b/Marlin/Marlin.h
@@ -40,7 +40,6 @@
 #include "fastio.h"
 #include "utility.h"
 #include "serial.h"
-#include "WString.h"
 
 #if ENABLED(PRINTCOUNTER)
   #include "printcounter.h"