Story highlights Hillary Clinton and Bernie Sanders will meet Tuesday night in Washington

The two plan to discuss the Democratic platform, Sanders said

Washington (CNN) Hillary Clinton and Bernie Sanders are set to meet Tuesday night in Washington -- a step that could help Democrats avoid a contested convention.

Sanders revealed plans for the meeting Sunday on CBS' "Face the Nation," and a Clinton aide confirmed to CNN that it is planned for Tuesday night. The aide didn't offer details on where or when it would take place.

Sanders emphasized the importance of the Democratic platform in his interview with CBS' John Dickerson, signaling that he's looking for concessions there in order to avoid a contested convention.

"I will be meeting, as I understand it on Tuesday night with Secretary Clinton, and I will get a sense from her about the nature of the Democratic platform," Sanders said.

Pointing to issues like income inequality and health care, Sanders said: "I look forward to sitting down with Sec. Clinton to see what kind of platform she is going to support and in fact how aggressive she is going to be in addressing the major crises that we face."

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