diff --git a/addon/www/index.html b/addon/www/index.html
index db975a2..6449247 100644
--- a/addon/www/index.html
+++ b/addon/www/index.html
@@ -270,10 +270,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 						$('[data-update-addon-id="' + addon_id + '"]').removeClass('loading');
 						$('[data-update-addon-id="' + addon_id + '"]').removeClass('disabled');
 						$('[data-uninstall-addon-id="' + addon_id + '"]').removeClass('disabled');
+						$('#install-addon-url-button').removeClass('disabled');
 						display_message('success', data, 6000000);
 						if (addon_id) {
-							$('#install-addon-url-button').removeClass('disabled');
-							$('#install-addon-url-input').val('');
 							$('#tr-' + addon_id).removeClass('warning');
 							$('#tr-' + addon_id).addClass('positive');
 							$('#button-update-' + addon_id).removeClass('green');
@@ -282,6 +281,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 							$('#label-version-' + addon_id).text($('#label-available-version-' + addon_id).text());
 						}
 						else {
+							$('#install-addon-url-input').val('');
 							get_addon_info();
 						}
 					},