diff --git a/.eslintrc b/.eslintrc
index 2bf462e10..c7a7f3374 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -64,13 +64,16 @@
         "no-template-curly-in-string": "warn",
         "no-throw-literal": "error",
         "no-undef": "error",
-        "no-unneeded-ternary": "error",
-        "no-unused-expressions": "error",
         "no-unexpected-multiline": "error",
-        "no-unused-vars": "warn",
+        "no-unneeded-ternary": "error",
+        "no-unmodified-loop-condition": "error",
         "no-unreachable": "warn",
         "no-unreachable-loop": "warn",
+        "no-unused-expressions": "error",
+        "no-unused-vars": "warn",
         "no-useless-escape": "off",
+        "no-useless-call": "warn",
+        "no-useless-concat": "warn",
         "no-void": "error",
         "no-warning-comments": "warn",
         "no-with": "error",
diff --git a/modules/operations/delete.js b/modules/operations/delete.js
index b6c3c6e24..9a7bd8ce6 100644
--- a/modules/operations/delete.js
+++ b/modules/operations/delete.js
@@ -132,7 +132,7 @@ export function operationDelete(context, selectedIDs) {
         var disable = operation.disabled();
         return disable ?
             t('operations.delete.' + disable + '.' + multi) :
-            t('operations.delete.description' + '.' + multi);
+            t('operations.delete.description.' + multi);
     };