UPDATED April 11, 2018 8:30 a.m. PT with Starbucks' apology to the customer.

This is one way to sour a sweet morning coffee.

While Starbucks baristas are somewhat infamous for labeling customers’ cups with misspelled names, the note one Florida man found on his mocha this week was decidedly less humorous.

The customer, who was interviewed anonymously by Florida's Action News Jax, said he was served a grande white mocha at a St. Augustine-area Starbucks labeled with the words "Diabetes here I come" where a customer's name would normally be.

A @Starbucks customer tells me he's hurt by the message he received on his coffee cup. Details on @ActionNewsJax pic.twitter.com/hNMeC6ysRJ — Kaitlyn Chana (@KaitlynANjax) April 8, 2016

The customer told Action News that the note was especially painful because his two sisters have Type 1 diabetes.

“That first word just automatically brought the picture of both sisters in my head, and I was taken aback,” the man said. “Just the struggles they went through and all the doctor appointments they had."

A Starbucks spokesperson told Mashable the company has reached out to the customer to apologize.

"We strive to provide an inclusive and positive experience for our customers, and were disappointed to learn of this incident," the spokesperson said in a statement. "We are working directly with the customer to apologize for his experience, and with our partners (employees) to ensure this does not happen again."

The customer said he didn't order the drink in-person — an employee at his workplace picks up coffees for the office — but that he did personally return the coffee, with a note.

"2 of my sisters are diabetic, so ... not funny," he wrote on the cup, telling Action News he isn't seeking an apology, but just an assurance that the incident won't happen again.

A customer at the Palencia @Starbucks wanted a grande white mocha, but he got more than he bargained for. pic.twitter.com/cOW20zMAgB — Kaitlyn Chana (@KaitlynANjax) April 8, 2016

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