diff --git a/platform/src/ssl_service_cache.cpp b/platform/src/ssl_service_cache.cpp
index 8fdec22..21ad23f 100644
--- a/platform/src/ssl_service_cache.cpp
+++ b/platform/src/ssl_service_cache.cpp
@@ -68,8 +68,8 @@ static void ssl_svc_free_server_st(void * data)
 static size_t ssl_svc_client_st_mk_key(const struct ssl_chello* chello, char* key_buff, size_t sz)
 {
 	size_t key_len=0;
-	key_len=snprintf(key_buff, sz, "%d.%d-%d.%d:%s:%s:%s:", chello->min_version.major, chello->min_version.minor,
-													chello->max_version.major, chello->max_version.minor,
+	key_len=snprintf(key_buff, sz, "%d:%d:%s:%s:", chello->min_version.ossl_format, 
+													chello->max_version.ossl_format,
 													chello->sni, chello->alpn?chello->alpn:"null");
 	if(chello->cipher_suites && sz-key_len>chello->cipher_suites_len)
 	{