diff --git a/services/convert/attachment.go b/services/convert/attachment.go
index ab36a1c577856..56fdc6b9c11df 100644
--- a/services/convert/attachment.go
+++ b/services/convert/attachment.go
@@ -16,10 +16,6 @@ func WebAssetDownloadURL(repo *repo_model.Repository, attach *repo_model.Attachm
 }
 
 func APIAssetDownloadURL(repo *repo_model.Repository, attach *repo_model.Attachment) string {
-	if attach.CustomDownloadURL != "" {
-		return attach.CustomDownloadURL
-	}
-
 	// /repos/{owner}/{repo}/releases/{id}/assets/{attachment_id}
 	return setting.AppURL + "api/repos/" + repo.FullName() + "/releases/" + strconv.FormatInt(attach.ReleaseID, 10) + "/assets/" + strconv.FormatInt(attach.ID, 10)
 }
diff --git a/tests/integration/api_releases_test.go b/tests/integration/api_releases_test.go
index 7f439390833e3..40ea1cac15537 100644
--- a/tests/integration/api_releases_test.go
+++ b/tests/integration/api_releases_test.go
@@ -14,6 +14,7 @@ import (
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/tests"
 
@@ -38,6 +39,8 @@ func TestAPIListReleases(t *testing.T) {
 			case 1:
 				assert.False(t, release.IsDraft)
 				assert.False(t, release.IsPrerelease)
+				assert.Len(t, release.Attachments, 1)
+				assert.EqualValues(t, setting.AppURL+"api/repos/user2/repo1/releases/1/assets/9", release.Attachments[0].DownloadURL)
 			case 4:
 				assert.True(t, release.IsDraft)
 				assert.False(t, release.IsPrerelease)