diff --git a/include/dns_decoder.h b/include/dns_decoder.h
index be6c60c..92d8e98 100644
--- a/include/dns_decoder.h
+++ b/include/dns_decoder.h
@@ -8,8 +8,7 @@
 ***********************************************************************************************
 */
 
-#ifndef _DNS_DECODER_H_
-#define _DNS_DECODER_H_
+#pragma once
 
 #ifdef __cplusplus
 extern "C"
@@ -284,5 +283,3 @@ void dns_message_additional_resource_record_get0(struct dns_message *msg, struct
 #ifdef __cplusplus
 }
 #endif
-
-#endif