Generalization of a conditional taste aversion to novel flavors was examined in the rat. Using a two-bottle choice test, the relative palatability for seven flavors was determined. Two of the moderately palatable flavors, lemon and peppermint-sucrose, were paired with an injection of lithium chloride (5 ml/kg.36 M LiC1 IP). Each of the seven flavors was then reranked in a second test for the lithium-chloride-injected animals. Results indicate that palatable flavors generalize to taste aversions less readily than do those flavors which are less palatable.