diff --git a/src/ngAria/aria.js b/src/ngAria/aria.js
index f50c7e9776f2..9eb7d4a6b2c9 100644
--- a/src/ngAria/aria.js
+++ b/src/ngAria/aria.js
@@ -377,6 +377,7 @@ ngAriaModule.directive('ngShow', ['$aria', function($aria) {
             elem.on('keypress', function(event) {
               var keyCode = event.which || event.keyCode;
               if (keyCode === 32 || keyCode === 13) {
+                event.preventDefault();
                 scope.$apply(callback);
               }