diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index 1bc118139fb57ec3b8db703cb17e0935dc06e157..9a99c17f308ccb47f9f9d88bda31cbcbe2a1fb75 100644
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -711,6 +711,11 @@ def construct(self):
             self.run_command('strip -S %(viewer_binary)r' %
                              { 'viewer_binary' : self.dst_path_of('Contents/MacOS/Second Life')})
 
+    def copy_finish(self):
+        # Force executable permissions to be set for scripts
+        # see CHOP-223 and http://mercurial.selenic.com/bts/issue1802
+        for script in 'MacOS/update_install':
+            self.run_command("chmod +x %r" % os.path.join(self.get_dst_prefix(), script))
 
     def package_finish(self):
         channel_standin = 'Second Life Viewer 2'  # hah, our default channel is not usable on its own
@@ -866,6 +871,12 @@ def construct(self):
 
         self.path("featuretable_linux.txt")
 
+    def copy_finish(self):
+        # Force executable permissions to be set for scripts
+        # see CHOP-223 and http://mercurial.selenic.com/bts/issue1802
+        for script in 'secondlife', 'bin/update_install':
+            self.run_command("chmod +x %r" % os.path.join(self.get_dst_prefix(), script))
+
     def package_finish(self):
         if 'installer_name' in self.args:
             installer_name = self.args['installer_name']