diff --git a/library/cipher.c b/library/cipher.c
index 4abc427..d14781b 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -728,7 +728,7 @@
             diff |= tag[i] ^ check_tag[i];
 
         if( diff != 0 )
-            return( POLARSSL_ERR_GCM_AUTH_FAILED );
+            return( POLARSSL_ERR_CIPHER_AUTH_FAILED );
 
         return( 0 );
     }