diff --git a/mozilla/xpinstall/packager/windows/browser.jst b/mozilla/xpinstall/packager/windows/browser.jst
index 8e6ff4b7b35..5066baf6583 100644
--- a/mozilla/xpinstall/packager/windows/browser.jst
+++ b/mozilla/xpinstall/packager/windows/browser.jst
@@ -313,7 +313,7 @@ function registerMainKeys(winreg)
     data = "\"" + fProgram + "$MainExeFile$\"";
     winreg.setValueString(subkey + "\\shell\\open\\command", "", data);
 
-    data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ms /ua \"$UserAgent$\" /hs browser";
+    data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ua \"$UserAgent$\" /hs browser";
     winreg.setValueString(subkey + "\\InstallInfo", "HideIconsCommand", data);
 
     winreg.setValueNumber(subkey + "\\InstallInfo", "IconsVisible", 1);
@@ -321,7 +321,7 @@ function registerMainKeys(winreg)
     data = "\"" + fProgram + "$MainExeFile$\" -silent -nosplash -setDefaultBrowser ";
     winreg.setValueString(subkey + "\\InstallInfo", "ReinstallCommand", data);
 
-    data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ms /ua \"$UserAgent$\" /ss browser";
+    data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ua \"$UserAgent$\" /ss browser";
     winreg.setValueString(subkey + "\\InstallInfo", "ShowIconsCommand", data);
   }
 }
diff --git a/mozilla/xpinstall/packager/windows/mail.jst b/mozilla/xpinstall/packager/windows/mail.jst
index 315841c3dcc..a40255d1e82 100644
--- a/mozilla/xpinstall/packager/windows/mail.jst
+++ b/mozilla/xpinstall/packager/windows/mail.jst
@@ -232,7 +232,7 @@ function createShortcuts()
       data = "\"" + fProgram + "$MainExeFile$\" -mail";
       winreg.setValueString(subkey + "\\shell\\open\\command", "", data);
 
-      data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ms /ua \"$UserAgent$\" /hs mail";
+      data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ua \"$UserAgent$\" /hs mail";
       winreg.setValueString(subkey + "\\InstallInfo", "HideIconsCommand", data);
 
       // set this value to 0 because we're not creating the mail shortcuts yet.
@@ -241,7 +241,7 @@ function createShortcuts()
       data = "\"" + fProgram + "$MainExeFile$\" -silent -nosplash -setDefaultMail";
       winreg.setValueString(subkey + "\\InstallInfo", "ReinstallCommand", data);
 
-      data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ms /ua \"$UserAgent$\" /ss mail";
+      data = "\"" + fProgram + "uninstall\\$UninstallFile$\" /ua \"$UserAgent$\" /ss mail";
       winreg.setValueString(subkey + "\\InstallInfo", "ShowIconsCommand", data);
     }
   }