diff --git a/Mac/scripts/buildpkg.py b/Mac/scripts/buildpkg.py
index e6dc474..e50c405 100644
--- a/Mac/scripts/buildpkg.py
+++ b/Mac/scripts/buildpkg.py
@@ -451,7 +451,7 @@
 
     try:
         opts, args = getopt.getopt(sys.argv[1:], shortOpts, longOpts)
-    except getopt.GetoptError, details:
+    except getopt.GetoptError as details:
         print details
         printUsage()
         return