It happened in the 3800 block of Wipprecht Street in northeast Houston Friday afternoon.
Lt. Isaac Jefferson with the Houston Police Department said a man and his 13-year-old godson were moving boxes from one car to another.
Jefferson said the man lost his balance and dropped a bag containing a revolver.
Teen shot while moving boxes was accidental, HPD believes
"The revolver fell out and the gun went off and hit the young man in the hip," said Jefferson.
The teen was rushed to the hospital, though his condition is unknown. In a tweet posted by HPD, investigators believe this was all an accident.
This is a developing story. This article will be updated as more information becomes available.