diff --git a/src/gsm/milenage/aes.h b/src/gsm/milenage/aes.h
index ba384a9..7e97f61 100644
--- a/src/gsm/milenage/aes.h
+++ b/src/gsm/milenage/aes.h
@@ -12,8 +12,7 @@
  * See README and COPYING for more details.
  */
 
-#ifndef AES_H
-#define AES_H
+#pragma once
 
 #define AES_BLOCK_SIZE 16
 
@@ -23,5 +22,3 @@
 void * aes_decrypt_init(const u8 *key, size_t len);
 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain);
 void aes_decrypt_deinit(void *ctx);
-
-#endif /* AES_H */
diff --git a/src/gsm/milenage/aes_i.h b/src/gsm/milenage/aes_i.h
index 6b40bc7..c831757 100644
--- a/src/gsm/milenage/aes_i.h
+++ b/src/gsm/milenage/aes_i.h
@@ -12,8 +12,7 @@
  * See README and COPYING for more details.
  */
 
-#ifndef AES_I_H
-#define AES_I_H
+#pragma once
 
 #include "aes.h"
 
@@ -118,5 +117,3 @@
 #define AES_PRIV_SIZE (4 * 44)
 
 void rijndaelKeySetupEnc(u32 rk[/*44*/], const u8 cipherKey[]);
-
-#endif /* AES_I_H */
diff --git a/src/gsm/milenage/aes_wrap.h b/src/gsm/milenage/aes_wrap.h
index 4b1c7b0..afa1451 100644
--- a/src/gsm/milenage/aes_wrap.h
+++ b/src/gsm/milenage/aes_wrap.h
@@ -19,8 +19,7 @@
  * See README and COPYING for more details.
  */
 
-#ifndef AES_WRAP_H
-#define AES_WRAP_H
+#pragma once
 
 int __must_check aes_wrap(const u8 *kek, int n, const u8 *plain, u8 *cipher);
 int __must_check aes_unwrap(const u8 *kek, int n, const u8 *cipher, u8 *plain);
@@ -44,5 +43,3 @@
 				     size_t data_len);
 int __must_check aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data,
 				     size_t data_len);
-
-#endif /* AES_WRAP_H */
diff --git a/src/gsm/milenage/milenage.h b/src/gsm/milenage/milenage.h
index a91e946..6fb779c 100644
--- a/src/gsm/milenage/milenage.h
+++ b/src/gsm/milenage/milenage.h
@@ -12,8 +12,7 @@
  * See README and COPYING for more details.
  */
 
-#ifndef MILENAGE_H
-#define MILENAGE_H
+#pragma once
 
 void milenage_generate(const u8 *opc, const u8 *amf, const u8 *k,
 		       const u8 *sqn, const u8 *_rand, u8 *autn, u8 *ik,
@@ -31,5 +30,3 @@
 		   u8 *res, u8 *ck, u8 *ik, u8 *ak, u8 *akstar);
 
 int milenage_opc_gen(u8 *opc, const u8 *k, const u8 *op);
-
-#endif /* MILENAGE_H */