diff --git a/controller/relay-text.go b/controller/relay-text.go
index 8dfdf6e1..25a10679 100644
--- a/controller/relay-text.go
+++ b/controller/relay-text.go
@@ -140,6 +140,9 @@ func relayTextHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
 		fullRequestURL += "?access_token=" + apiKey // TODO: access token expire in 30 days
 	case APITypePaLM:
 		fullRequestURL = "https://generativelanguage.googleapis.com/v1beta2/models/chat-bison-001:generateMessage"
+		if baseURL != "" {
+			fullRequestURL = fmt.Sprintf("%s/v1beta2/models/chat-bison-001:generateMessage", baseURL)
+		}
 		apiKey := c.Request.Header.Get("Authorization")
 		apiKey = strings.TrimPrefix(apiKey, "Bearer ")
 		fullRequestURL += "?key=" + apiKey