diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index 79eab65..d861f2f 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -697,7 +697,7 @@
     /*
      * Encrypt
      */
-#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER)
+#if defined(MBEDTLS_CIPHER_NULL_CIPHER)
     if( mode == MBEDTLS_MODE_STREAM )
     {
         int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
@@ -722,7 +722,7 @@
         }
     }
     else
-#endif /* MBEDTLS_ARC4_C || MBEDTLS_CIPHER_NULL_CIPHER */
+#endif /* MBEDTLS_CIPHER_NULL_CIPHER */
 
 #if defined(MBEDTLS_GCM_C) || \
     defined(MBEDTLS_CCM_C) || \
@@ -1258,7 +1258,7 @@
     }
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
 
-#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER)
+#if defined(MBEDTLS_CIPHER_NULL_CIPHER)
     if( mode == MBEDTLS_MODE_STREAM )
     {
         padlen = 0;
@@ -1279,7 +1279,7 @@
         }
     }
     else
-#endif /* MBEDTLS_ARC4_C || MBEDTLS_CIPHER_NULL_CIPHER */
+#endif /* MBEDTLS_CIPHER_NULL_CIPHER */
 #if defined(MBEDTLS_GCM_C) || \
     defined(MBEDTLS_CCM_C) || \
     defined(MBEDTLS_CHACHAPOLY_C)