diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 95028eeab7..44b978c0cd 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -8,6 +8,7 @@ Yii Framework 2 Change Log
 - Bug #17156: Fixes PHP 7.2 warning when a data provider has no data as a parameter for a GridView (evilito)
 - Bug #17083: Fixed `yii\validators\EmailValidator::$checkDNS` tells that every domain is correct on alpine linux (mikk150)
 - Bug #17180: Do not populate `yii\web\Response::$response` when response code is 204 (mikk150)
+- Bug #17124: Fixed ErrorException when run `./yii fixture/unload` without arguments (ricpelo)
 
 
 2.0.16.1 February 28, 2019
diff --git a/framework/console/controllers/FixtureController.php b/framework/console/controllers/FixtureController.php
index 0ad64e81ef..da7fc1e042 100644
--- a/framework/console/controllers/FixtureController.php
+++ b/framework/console/controllers/FixtureController.php
@@ -109,11 +109,7 @@ class FixtureController extends Controller
     public function actionLoad(array $fixturesInput = [])
     {
         if ($fixturesInput === []) {
-            $this->stdout($this->getHelpSummary() . "\n");
-
-            $helpCommand = Console::ansiFormat('yii help fixture', [Console::FG_CYAN]);
-            $this->stdout("Use $helpCommand to get usage info.\n");
-
+            $this->printHelpMessage();
             return ExitCode::OK;
         }
 
@@ -188,6 +184,11 @@ class FixtureController extends Controller
      */
     public function actionUnload(array $fixturesInput = [])
     {
+        if ($fixturesInput === []) {
+            $this->printHelpMessage();
+            return ExitCode::OK;
+        }
+
         $filtered = $this->filterFixtures($fixturesInput);
         $except = $filtered['except'];
 
@@ -232,6 +233,18 @@ class FixtureController extends Controller
         $this->notifyUnloaded($fixtures);
     }
 
+    /**
+     * Show help message.
+     * @param array $fixturesInput
+     */
+    private function printHelpMessage()
+    {
+        $this->stdout($this->getHelpSummary() . "\n");
+
+        $helpCommand = Console::ansiFormat('yii help fixture', [Console::FG_CYAN]);
+        $this->stdout("Use $helpCommand to get usage info.\n");
+    }
+
     /**
      * Notifies user that fixtures were successfully loaded.
      * @param array $fixtures