diff --git a/internal/web/job/ldap_sync_job.go b/internal/web/job/ldap_sync_job.go
index bc965b2e7..25789624e 100644
--- a/internal/web/job/ldap_sync_job.go
+++ b/internal/web/job/ldap_sync_job.go
@@ -189,7 +189,7 @@ func (j *LdapSyncJob) buildClient(email string, defGB, defExpiryDays, defLimitIP
 		Email:   email,
 		Enable:  true,
 		LimitIP: defLimitIP,
-		TotalGB: int64(defGB),
+		TotalGB: int64(defGB) * 1024 * 1024 * 1024,
 	}
 	if defExpiryDays > 0 {
 		c.ExpiryTime = time.Now().Add(time.Duration(defExpiryDays) * 24 * time.Hour).UnixMilli()
diff --git a/internal/web/job/ldap_sync_job_test.go b/internal/web/job/ldap_sync_job_test.go
index f3ce38d7e..1df9dba3e 100644
--- a/internal/web/job/ldap_sync_job_test.go
+++ b/internal/web/job/ldap_sync_job_test.go
@@ -19,6 +19,14 @@ func initLdapJobDB(t *testing.T) {
 	t.Cleanup(func() { _ = database.CloseDB() })
 }
 
+func TestBuildClient_ConvertsDefaultTotalGBToBytes(t *testing.T) {
+	j := NewLdapSyncJob()
+	c := j.buildClient("user@example.com", 10, 0, 0)
+	if want := int64(10) * 1024 * 1024 * 1024; c.TotalGB != want {
+		t.Errorf("TotalGB = %d, want %d", c.TotalGB, want)
+	}
+}
+
 func TestLdapCreateClients_AttachesToAllConfiguredInbounds(t *testing.T) {
 	initLdapJobDB(t)
 	db := database.GetDB()