We have measured the chlorine isotope ratio in six M giant stars using HCl 1-0 P8 features at 3.7 microns with R \sim 50,000 spectra from Phoenix on Gemini South .
The average Cl isotope ratio for our sample of stars is 2.66 \pm 0.58 and the range of measured Cl isotope ratios is 1.76 < ^ { 35 } Cl/ ^ { 37 } Cl < 3.42 .
The solar system meteoric Cl isotope ratio of 3.13 is consistent with the range seen in the six stars .
We suspect the large variations in Cl isotope ratio are intrinsic to the stars in our sample given the uncertainties .
Our average isotopic ratio is higher than the value of 1.80 for the solar neighborhood at solar metallicity predicted by galactic chemical evolution models .
Finally the stellar isotope ratios in our sample are similar to those measured in the interstellar medium .