Easy peasy...get some wood glue (I like Gorilla but Elmers wood glue is good, too) and a few toothpicks.
Dip 1-2 toothpicks into the glue and insert as far as you can into the hole...cut off any sticking out so it's flush.
Either wait for the glue to dry or, for a more permanent hold, screw into the hole while the glue is wet.
My father-in-law taught me this trick!
Rick & Karen
(Retired USAF, MSgt)
5-year Travel Trailer RVers
2013 Forest River Rockwood Ultra-Lite 2904SS
2014 Toyota Tundra Maxcrew SR-5 TRD 4x4