E2003 when setting TLSOptions.Version via Code

I Try to configure a webSocketClient via Code.

When i try to set the TLSOptions.Version to "TwsTLSVersions.tls1_2;" i get an E2003 (undeclared identifier)

FClient.TLSOptions.Version := TwsTLSVersions.tls1_2;

Is there a special Unit i have to add to the uses?

Or is the cause that i use the Basic Edition wthout full sources?