diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index 29751edfac203b77dd9dd56c254e2c5007ac1186..1b6e8c9747060743f56413295d7605fd60816e38 100755
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -1049,6 +1049,10 @@ def package_finish(self):
         self.package_file = finalname
         self.remove(sparsename)
 
+class Darwin_i686_Manifest(Darwin_i386_Manifest):
+    """alias in case arch is passed as i686 instead of i386"""
+    pass
+
 class LinuxManifest(ViewerManifest):
     def construct(self):
         super(LinuxManifest, self).construct()