diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index a832426..6c43a0a 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -1,6 +1,6 @@
 /*
  * Block chaining cipher operations.
- * 
+ *
  * Generic encrypt/decrypt wrapper for ciphers, handles operations across
  * multiple page boundaries by using temporary blocks.  In user context,
  * the kernel is given a chance to schedule us once per page.
@@ -9,7 +9,7 @@
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option) 
+ * Software Foundation; either version 2 of the License, or (at your option)
  * any later version.
  *
  */
@@ -25,6 +25,7 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/cryptouser.h>
+#include <linux/compiler.h>
 #include <net/netlink.h>
 
 #include "internal.h"
@@ -534,7 +535,7 @@ static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
 #endif
 
 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
-	__attribute__ ((unused));
+	__maybe_unused;
 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
 {
 	seq_printf(m, "type         : blkcipher\n");