(CNN)Daylin Campbell got a mountain bike for Christmas, but he wasn't able to ride it because he's been battling leukemia.
Teen battling leukemia gets a surprise after someone stole his bike
The 13-year-old had been building up his strength and looking forward to taking the bike out for a spin.
On Monday, somebody stole it off the porch of his home in Lake Wales, Florida.
"I thought, 'Who would take my bike,' " Daylin said in an interview with CNN affiliate WFTS in Tampa.
His mom said the bike, with its "Daylin strong" stickers on the side, had a lot of sentimental value.
The Polk County Sheriff's Office decided to do something to cheer the boy up, while officers looked for the bicycle thief.
Sheriff Grady Judd and some of his officers came to Daylin's house to bring him a brand new bike, a helmet and lock.
Daylin thanked the men and smiled quietly, while they worked to make sure the bicycle helmet fit.
He answered with a polite "yes sir," when the sheriff asked him if he was feeling well and taking care of himself.
Daylin was diagnosed with acute myeloid leukemia in May, WFTS reported, and was hospitalized a number of times between May and Decemb