diff --git a/include/d/lyt/d_lyt_meter_hio.h b/include/d/lyt/d_lyt_meter_hio.h
index e02379b6..9e68f7ce 100644
--- a/include/d/lyt/d_lyt_meter_hio.h
+++ b/include/d/lyt/d_lyt_meter_hio.h
@@ -1,5 +1,5 @@
-#ifndef D_LYT_METER_HIO_C
-#define D_LYT_METER_HIO_C
+#ifndef D_LYT_METER_HIO_H
+#define D_LYT_METER_HIO_H
 
 #include "common.h"