diff --git a/awx/ui/static/js/controllers/Inventories.js b/awx/ui/static/js/controllers/Inventories.js
index eb6ee30072..31ace3d3a5 100644
--- a/awx/ui/static/js/controllers/Inventories.js
+++ b/awx/ui/static/js/controllers/Inventories.js
@@ -910,8 +910,16 @@ export function InventoriesManage ($log, $scope, $rootScope, $location,
     $scope.populateAdhocForm = function() {
         var host_patterns = "all";
         if ($scope.hostsSelected || $scope.groupsSelected) {
-            var allSelectedItems = $scope.groupsSelectedItems.concat($scope.hostsSelectedItems);
-            host_patterns = _.pluck(allSelectedItems, "name").join(":");
+            var allSelectedItems = [];
+            if ($scope.groupsSelectedItems) {
+                allSelectedItems = allSelectedItems.concat($scope.groupsSelectedItems);
+            }
+            if ($scope.hostsSelectedItems) {
+                allSelectedItems = allSelectedItems.concat($scope.hostsSelectedItems);
+            }
+            if (allSelectedItems) {
+                host_patterns = _.pluck(allSelectedItems, "name").join(":");
+            }
         }
         $rootScope.hostPatterns = host_patterns;
         $location.path('/inventories/' + $scope.inventory.id + '/adhoc');