diff --git a/build/mac/find_sdk.py b/build/mac/find_sdk.py
index a883fb9d08..11ce3d0bb6 100755
--- a/build/mac/find_sdk.py
+++ b/build/mac/find_sdk.py
@@ -60,7 +60,7 @@ def main():
     sdk_dir = xcode43_sdk_path
   else:
     sdk_dir = os.path.join(out.rstrip(), 'SDKs')
-  sdks = [re.findall('^MacOSX(1[0|1]\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
+  sdks = [re.findall('^MacOSX(1[0-2]\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
   sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
   sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
           if parse_version(s) >= parse_version(min_sdk_version)]