diff --git a/tildes/static/js/behaviors/autocomplete-input.js b/tildes/static/js/behaviors/autocomplete-input.js
index a2509a7..3413d36 100644
--- a/tildes/static/js/behaviors/autocomplete-input.js
+++ b/tildes/static/js/behaviors/autocomplete-input.js
@@ -99,6 +99,7 @@ $.onmount('[data-js-autocomplete-input]', function() {
                 break;
             case 'Backspace':
                 if ($(this).val() === '') {
+                    event.preventDefault();
                     var $autocompleteContainer = $(this).parents('[data-js-autocomplete-container]').first();
                     var $chips = $autocompleteContainer.find('[data-js-autocomplete-chips]').first();
                     var $tagsHiddenInput = $("[data-js-autocomplete-hidden-input]");