The Austrian, along with fellow attacker Christian Benteke, has not scored since the 3-2 win over Manchester City in late September but Lambert knows he has the ability to return his scoring ways soon.
"I think any goalscorer would always want to score and he's no different,” he said.
"It will come, I've got no worries whatsoever, but his work-rate is important to us and his enthusiasm is important. I'm pretty sure his goals will come."
Weimann will get the chance to end his mini-drought when Villa head to West Ham United this weekend.
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