diff --git a/Marlin/example_configurations/delta/Configuration.h b/Marlin/example_configurations/delta/Configuration.h
index 35f7e81b2..e44d3c786 100644
--- a/Marlin/example_configurations/delta/Configuration.h
+++ b/Marlin/example_configurations/delta/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"