diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index e16c674..7035c27 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -132,10 +132,10 @@
 #define MBEDTLS_SSL_EXT_KEY_SHARE                   ( 1 << 21 )
 
 /*
- * Helper macros for function call with returen check.
+ * Helper macros for function call with return check.
  */
 /*
- * Exit and print debug message when return none zero value
+ * Exit when return non-zero value
  */
 #define MBEDTLS_SSL_PROC_CHK( f )                               \
     do {                                                        \
@@ -146,7 +146,7 @@
         }                                                       \
     } while( 0 )
 /*
- * Exit and print debug message when return negative value
+ * Exit when return negative value
  */
 #define MBEDTLS_SSL_PROC_CHK_NEG( f )                           \
     do {                                                        \
diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index 262481c..f8779a0 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -164,8 +164,8 @@
         ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( cipher_suite );
         if( ciphersuite_info == NULL )
             continue;
-        if( ciphersuite_info->min_minor_ver != MBEDTLS_SSL_MINOR_VERSION_4 ||
-            ciphersuite_info->max_minor_ver != MBEDTLS_SSL_MINOR_VERSION_4 )
+        if( !( MBEDTLS_SSL_MINOR_VERSION_4 > ciphersuite_info->min_minor_ver &&
+               MBEDTLS_SSL_MINOR_VERSION_4 < ciphersuite_info->max_minor_ver ) )
             continue;
 
         MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %04x, %s",
@@ -173,7 +173,7 @@
                                     ciphersuite_info->name ) );
 
         /* Check there is space for the cipher suite identifier (2 bytes). */
-        MBEDTLS_SSL_CHK_BUF_PTR( buf, end, 2 );
+        MBEDTLS_SSL_CHK_BUF_PTR( cipher_suites_iter, end, 2 );
         MBEDTLS_PUT_UINT16_BE( cipher_suite, cipher_suites_iter, 0 );
         cipher_suites_iter += 2;
     }
@@ -210,7 +210,7 @@
 {
 
     int ret;
-    unsigned char *extensions_len_ptr; /* Pointer of extensions length */
+    unsigned char *extensions_len_ptr; /* Pointer to extensions length */
     size_t output_len;                 /* Length of buffer used by function */
     size_t extensions_len;             /* Length of the list of extensions*/
 
@@ -362,7 +362,7 @@
                                   ssl->handshake->randbytes,
                                   CLIENT_HELLO_RANDOM_LEN ) ) != 0 )
     {
-        MBEDTLS_SSL_DEBUG_RET( 1, "ssl_generate_random", ret );
+        MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
         return( ret );
     }
 
@@ -410,12 +410,6 @@
 {
     int ret = 0;
 
-    if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "Handshake completed but ssl->handshake is NULL.\n" ) );
-        return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-    }
-
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
 
     switch( ssl->state )