diff --git a/ROADMAP.md b/ROADMAP.md
index a484a05..e50f86b 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -199,7 +199,7 @@
 - [X] "no-underscore-dangle"
 - [ ] "no-unexpected-multiline"
 - [ ] "no-unmodified-loop-condition"
-- [ ] "no-unneeded-ternary"
+- [X] "no-unneeded-ternary"
 - [ ] "no-unreachable"
 - [ ] "no-unsafe-finally"
 - [ ] "no-unsafe-negation"
diff --git a/src/rules/default.json b/src/rules/default.json
index dc3a90a..7a6f64b 100644
--- a/src/rules/default.json
+++ b/src/rules/default.json
@@ -254,6 +254,12 @@
       "enforceInMethodNames": false
     }
   ],
+  "no-unneeded-ternary": [
+    "error",
+    {
+      "defaultAssignment": true
+    }
+  ],
   "no-unused-vars": [
     "error",
     {