do not use reserved identifiers
diff --git a/libasn1compiler/asn1c_save.h b/libasn1compiler/asn1c_save.h
index d7382f4..d473086 100644
--- a/libasn1compiler/asn1c_save.h
+++ b/libasn1compiler/asn1c_save.h
@@ -1,7 +1,7 @@
-#ifndef	_ASN1C_SAVE_H_
-#define	_ASN1C_SAVE_H_
+#ifndef	ASN1C_SAVE_H
+#define	ASN1C_SAVE_H
 
 int asn1c_save_compiled_output(arg_t *arg, const char *datadir,
 	int argc, int optc, char **argv);
 
-#endif	/* _ASN1C_SAVE_H_ */
+#endif	/* ASN1C_SAVE_H */