We find no harmful error in the trial court's mere "slip of the tongue" in recharging the jury on corroboration. Taken as a whole, the recharge was correct and we affirm appellant's conviction of rape and kidnapping. Billups v. State, 236 Ga. 922 (3) (225 SE2d 887) (1976); Ward v. State, 238 Ga. 367 (233 SE2d 175) (1977).