diff --git a/src/transports/tls_channel.c b/src/transports/tls_channel.c
index 46f9229a2b489de9869251ca48e5ff5fa682c185..836f626e3e3aae1161cdf6da8a06d237be5987a7 100644
--- a/src/transports/tls_channel.c
+++ b/src/transports/tls_channel.c
@@ -517,6 +517,7 @@ static int tls_process_handshake(belle_sip_channel_t *obj){
 	char tmp[128];
 	int err=bctbx_ssl_handshake(channel->sslctx);
 	
+	memset(tmp, '\0', sizeof(tmp));
 	if (err == 0){
 		belle_sip_message("Channel [%p]: SSL handshake finished, SSL version is [%s], selected ciphersuite is [%s]",obj,
 				  bctbx_ssl_get_version(channel->sslctx), bctbx_ssl_get_ciphersuite(channel->sslctx));