diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 1396400..d116582 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -2903,13 +2903,19 @@
 
     hash_len = 12;
 
-    if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED ||
-        ssl->in_hslen  != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
+    if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED  )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
+        return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
+    }
+
+    if( ssl->in_hslen  != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
         mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
                                         MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
-        return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
+        return( MBEDTLS_ERR_SSL_DECODE_ERROR );
     }
 
     if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ),
@@ -2917,8 +2923,8 @@
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
         mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
-        return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
+        return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
     }
 
 #if defined(MBEDTLS_SSL_RENEGOTIATION)