diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index 3e771e4ad6a1eab8c46c352e5f432cb009f5bb89..9b6b9d017193cbea671b469bbfb0d56363a96eac 100755
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -793,6 +793,7 @@ def package_finish(self):
         for exe in (
             self.final_exe(),
             "SLVersionChecker.exe",
+            "llplugin/dullahan_host.exe",
             ):
             self.sign(exe)