diff --git a/src/WebSocketsClient.cpp b/src/WebSocketsClient.cpp
index 64b3f64..ebd83b6 100644
--- a/src/WebSocketsClient.cpp
+++ b/src/WebSocketsClient.cpp
@@ -170,6 +170,7 @@ void WebSocketsClient::loop(void) {
                 _client.tcp = NULL;
             }
             _client.ssl = new WEBSOCKETS_NETWORK_SSL_CLASS();
+			_client.ssl->setFingerprint(_fingerprint.c_str());
             _client.tcp = _client.ssl;
             if(_CA_cert) {
                 DEBUG_WEBSOCKETS("[WS-Client] setting CA certificate");