diff --git a/controller/relay-audio.go b/controller/relay-audio.go
index e6f54f01..381c6feb 100644
--- a/controller/relay-audio.go
+++ b/controller/relay-audio.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -31,6 +32,9 @@ func relayAudioHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode
 	if err != nil {
 		return errorWrapper(err, "get_user_quota_failed", http.StatusInternalServerError)
 	}
+	if userQuota-preConsumedQuota < 0 {
+		return errorWrapper(errors.New("user quota is not enough"), "insufficient_user_quota", http.StatusForbidden)
+	}
 	err = model.CacheDecreaseUserQuota(userId, preConsumedQuota)
 	if err != nil {
 		return errorWrapper(err, "decrease_user_quota_failed", http.StatusInternalServerError)
diff --git a/controller/relay-image.go b/controller/relay-image.go
index fb30895c..998a7851 100644
--- a/controller/relay-image.go
+++ b/controller/relay-image.go
@@ -99,7 +99,7 @@ func relayImageHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode
 	quota := int(ratio*sizeRatio*1000) * imageRequest.N
 
 	if consumeQuota && userQuota-quota < 0 {
-		return errorWrapper(err, "insufficient_user_quota", http.StatusForbidden)
+		return errorWrapper(errors.New("user quota is not enough"), "insufficient_user_quota", http.StatusForbidden)
 	}
 
 	req, err := http.NewRequest(c.Request.Method, fullRequestURL, requestBody)
diff --git a/controller/relay-text.go b/controller/relay-text.go
index 5a5f355b..3041e3a9 100644
--- a/controller/relay-text.go
+++ b/controller/relay-text.go
@@ -204,6 +204,9 @@ func relayTextHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
 	if err != nil {
 		return errorWrapper(err, "get_user_quota_failed", http.StatusInternalServerError)
 	}
+	if userQuota-preConsumedQuota < 0 {
+		return errorWrapper(errors.New("user quota is not enough"), "insufficient_user_quota", http.StatusForbidden)
+	}
 	err = model.CacheDecreaseUserQuota(userId, preConsumedQuota)
 	if err != nil {
 		return errorWrapper(err, "decrease_user_quota_failed", http.StatusInternalServerError)