diff --git a/handshake_client.go b/handshake_client.go
index eae1a42..088baa5 100644
--- a/handshake_client.go
+++ b/handshake_client.go
@@ -941,7 +941,11 @@ func (hs *clientHandshakeState) saveSessionTicket() error {
 	session.secret = hs.masterSecret
 
 	cs := &ClientSessionState{ticket: hs.ticket, session: session}
-	c.config.ClientSessionCache.Put(cacheKey, cs)
+	// [UTLS BEGIN]
+	if c.config.ClientSessionCache != nil { // skip saving session if cache is nil
+		c.config.ClientSessionCache.Put(cacheKey, cs)
+	}
+	// [UTLS END]
 	return nil
 }