diff --git a/jcommon/ai/google/src/main/java/run/mone/ai/google/bo/RequestPayload.java b/jcommon/ai/google/src/main/java/run/mone/ai/google/bo/RequestPayload.java
index b649a1331..ac55968a9 100644
--- a/jcommon/ai/google/src/main/java/run/mone/ai/google/bo/RequestPayload.java
+++ b/jcommon/ai/google/src/main/java/run/mone/ai/google/bo/RequestPayload.java
@@ -14,6 +14,8 @@
 @Builder
 public class RequestPayload {
 
+        @SerializedName("system")
+        private String system;
 
         @SerializedName("anthropic_version")
         private String anthropicVersion;