diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 035cf39..c6a11de 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -1718,6 +1718,9 @@
             md5_context md5;
             sha1_context sha1;
 
+            md5_init(  &md5  );
+            sha1_init( &sha1 );
+
             hashlen = 36;
 
             /*
@@ -1742,6 +1745,9 @@
             sha1_update( &sha1, ssl->handshake->randbytes, 64 );
             sha1_update( &sha1, ssl->in_msg + 4, params_len );
             sha1_finish( &sha1, hash + 16 );
+
+            md5_free(  &md5  );
+            sha1_free( &sha1 );
         }
         else
 #endif /* POLARSSL_SSL_PROTO_SSL3 || POLARSSL_SSL_PROTO_TLS1 || \