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-rw-r--r--src/lib/formats/thom_cas.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/lib/formats/thom_cas.h b/src/lib/formats/thom_cas.h
index a58646b507f..da0684d1e7c 100644
--- a/src/lib/formats/thom_cas.h
+++ b/src/lib/formats/thom_cas.h
@@ -7,9 +7,10 @@
Thomson 8-bit computers
**********************************************************************/
+#ifndef MAME_FORMATS_THOM_CAS_H
+#define MAME_FORMATS_THOM_CAS_H
-#ifndef THOM_CAS
-#define THOM_CAS
+#pragma once
#include "cassimg.h"
@@ -21,4 +22,4 @@ CASSETTE_FORMATLIST_EXTERN(to7_cassette_formats);
CASSETTE_FORMATLIST_EXTERN(mo5_cassette_formats);
-#endif
+#endif // MAME_FORMATS_THOM_CAS_H