diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index c2d86b91c6b616abb3196a0266f886e1738e8764..0fd3cf5b3b19243738ca185116f2743fa93c4d7d 100755
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -561,7 +561,7 @@ def package_finish(self):
 class DarwinManifest(ViewerManifest):
     def is_packaging_viewer(self):
         # darwin requires full app bundle packaging even for debugging.
-        return true
+        return True
 
     def construct(self):
         # copy over the build result (this is a no-op if run within the xcode script)