diff --git a/src/Support/PathGenerator/PathGeneratorFactory.php b/src/Support/PathGenerator/PathGeneratorFactory.php
index 8bb558302..63d770e6b 100644
--- a/src/Support/PathGenerator/PathGeneratorFactory.php
+++ b/src/Support/PathGenerator/PathGeneratorFactory.php
@@ -2,6 +2,7 @@
 
 namespace Spatie\MediaLibrary\Support\PathGenerator;
 
+use Illuminate\Database\Eloquent\Relations\Relation;
 use Spatie\MediaLibrary\MediaCollections\Exceptions\InvalidPathGenerator;
 use Spatie\MediaLibrary\MediaCollections\Models\Media;
 
@@ -9,7 +10,7 @@ class PathGeneratorFactory
 {
     public static function create(Media $media): PathGenerator
     {
-        $pathGeneratorClass = self::getPathGeneratorClass($media);
+        $pathGeneratorClass = static::getPathGeneratorClass($media);
 
         static::guardAgainstInvalidPathGenerator($pathGeneratorClass);
 
@@ -21,7 +22,7 @@ protected static function getPathGeneratorClass(Media $media)
         $defaultPathGeneratorClass = config('media-library.path_generator');
 
         foreach (config('media-library.custom_path_generators', []) as $modelClass => $customPathGeneratorClass) {
-            if (is_a($media->model_type, $modelClass, true) || $media->model_type === $modelClass) {
+            if (static::mediaBelongToModelClass($media, $modelClass)) {
                 return $customPathGeneratorClass;
             }
         }
@@ -29,6 +30,24 @@ protected static function getPathGeneratorClass(Media $media)
         return $defaultPathGeneratorClass;
     }
 
+    protected static function mediaBelongToModelClass(Media $media, string $modelClass): bool
+    {
+        // model doesn't have morphMap, so morph type and class are equal
+        if (is_a($media->model_type, $modelClass, true)) {
+            return true;
+        }
+        // config is set via morphMap alias
+        if ($media->model_type === $modelClass) {
+            return true;
+        }
+        // config is set via morphMap class name
+        if (is_a((string)Relation::getMorphedModel($media->model_type), $modelClass, true)) {
+            return true;
+        }
+
+        return false;
+    }
+
     protected static function guardAgainstInvalidPathGenerator(string $pathGeneratorClass): void
     {
         if (! class_exists($pathGeneratorClass)) {
diff --git a/tests/Support/PathGenerator/BasePathGeneratorTest.php b/tests/Support/PathGenerator/BasePathGeneratorTest.php
index 408ee5907..b05de650c 100644
--- a/tests/Support/PathGenerator/BasePathGeneratorTest.php
+++ b/tests/Support/PathGenerator/BasePathGeneratorTest.php
@@ -4,6 +4,7 @@
 use Spatie\MediaLibrary\Support\UrlGenerator\DefaultUrlGenerator;
 use Spatie\MediaLibrary\Tests\Support\PathGenerator\CustomPathGenerator;
 use Spatie\MediaLibrary\Tests\TestSupport\TestModels\TestModelWithConversion;
+use Spatie\MediaLibrary\Tests\TestSupport\TestModels\TestModelWithMorphMap;
 
 beforeEach(function () {
     $this->config = app('config');
@@ -61,3 +62,15 @@
 
     expect($media->getUrl())->toEqual('/media/c4ca4238a0b923820dcc509a6f75849b/test.jpg');
 });
+
+it('can use a custom path generator on a morph map model via class', function () {
+    config()->set('media-library.custom_path_generators', [
+        TestModelWithMorphMap::class => CustomPathGenerator::class,
+    ]);
+
+    $media = $this->testModelWithMorphMap
+        ->addMedia($this->getTestFilesDirectory('test.jpg'))
+        ->toMediaCollection();
+
+    expect($media->getUrl())->toEqual('/media/c4ca4238a0b923820dcc509a6f75849b/test.jpg');
+});