diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasGlobalScopes.php b/src/Illuminate/Database/Eloquent/Concerns/HasGlobalScopes.php
index 5d7047953115..320126366b73 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasGlobalScopes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasGlobalScopes.php
@@ -26,9 +26,11 @@ public static function addGlobalScope($scope, $implementation = null)
             return static::$globalScopes[static::class][spl_object_hash($scope)] = $scope;
         } elseif ($scope instanceof Scope) {
             return static::$globalScopes[static::class][get_class($scope)] = $scope;
+        } elseif (is_string($scope) && class_exists($scope) && is_subclass_of($scope, Scope::class)) {
+            return static::$globalScopes[static::class][$scope] = new $scope;
         }
 
-        throw new InvalidArgumentException('Global scope must be an instance of Closure or Scope.');
+        throw new InvalidArgumentException('Global scope must be an instance of Closure or Scope or be a class name of a class extending '.Scope::class);
     }
 
     /**
diff --git a/tests/Database/DatabaseEloquentGlobalScopesTest.php b/tests/Database/DatabaseEloquentGlobalScopesTest.php
index 7ae26071506d..a1bb15b3c4a1 100644
--- a/tests/Database/DatabaseEloquentGlobalScopesTest.php
+++ b/tests/Database/DatabaseEloquentGlobalScopesTest.php
@@ -43,6 +43,14 @@ public function testGlobalScopeCanBeRemoved()
         $this->assertEquals([], $query->getBindings());
     }
 
+    public function testClassNameGlobalScopeIsApplied()
+    {
+        $model = new EloquentClassNameGlobalScopesTestModel;
+        $query = $model->newQuery();
+        $this->assertSame('select * from "table" where "active" = ?', $query->toSql());
+        $this->assertEquals([1], $query->getBindings());
+    }
+
     public function testClosureGlobalScopeIsApplied()
     {
         $model = new EloquentClosureGlobalScopesTestModel;
@@ -190,6 +198,18 @@ public static function boot()
     }
 }
 
+class EloquentClassNameGlobalScopesTestModel extends Model
+{
+    protected $table = 'table';
+
+    public static function boot()
+    {
+        static::addGlobalScope(ActiveScope::class);
+
+        parent::boot();
+    }
+}
+
 class ActiveScope implements Scope
 {
     public function apply(Builder $builder, Model $model)