Zigbee and 433Mhz

I have an existing RFXCOM 433MHZ transceiver and want to add a Zigbee controller into the eco system.

The aerial for 433MHZ has an extension lead and and I want to do the same for Zigbee stick and bring it to the same spot but can I put them close to each other or will they interfere with each other frequency wise?

Totally different frequencies.

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I thought as much but thanks for confirming.