diff --git a/lib/aes_acc/asm/arm_arch.h b/lib/aes_acc/asm/arm_arch.h
index f8186a9..17284b8 100644
--- a/lib/aes_acc/asm/arm_arch.h
+++ b/lib/aes_acc/asm/arm_arch.h
@@ -7,8 +7,8 @@
  * https://www.openssl.org/source/license.html
  */
 
-#ifndef UDP2RAW__ARM_ARCH_H__
-# define UDP2RAW__ARM_ARCH_H__
+#ifndef UDP2RAW_ARM_ARCH_H_
+# define UDP2RAW_ARM_ARCH_H_
 
 # if !defined(__ARM_ARCH__)
 #  if defined(__CC_ARM)