diff --git a/spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/DefaultChatClient.java b/spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/DefaultChatClient.java
index 47b305c8dda..bcf1b7ed18e 100644
--- a/spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/DefaultChatClient.java
+++ b/spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/DefaultChatClient.java
@@ -820,7 +820,11 @@ public Builder mutate() {
 				.defaultToolNames(StringUtils.toStringArray(this.toolNames));
 
 			if (!CollectionUtils.isEmpty(this.advisors)) {
-				builder.defaultAdvisors(a -> a.advisors(this.advisors).params(this.advisorParams));
+				builder.defaultAdvisors(a -> a.advisors(this.advisors));
+			}
+
+			if (!CollectionUtils.isEmpty(this.advisorParams)) {
+				builder.defaultAdvisors(a -> a.params(this.advisorParams));
 			}
 
 			if (StringUtils.hasText(this.userText)) {
diff --git a/spring-ai-client-chat/src/test/java/org/springframework/ai/chat/client/ChatClientTests.java b/spring-ai-client-chat/src/test/java/org/springframework/ai/chat/client/ChatClientTests.java
index a7e38611d8a..6681d9f95cc 100644
--- a/spring-ai-client-chat/src/test/java/org/springframework/ai/chat/client/ChatClientTests.java
+++ b/spring-ai-client-chat/src/test/java/org/springframework/ai/chat/client/ChatClientTests.java
@@ -408,6 +408,20 @@ void mutateDefaults() {
 
 	}
 
+	@Test
+	void mutateAdvisorParams() {
+		ChatClient defaultChatClient = ChatClient.builder(this.chatModel)
+			.defaultAdvisors(AdvisorParams.ENABLE_NATIVE_STRUCTURED_OUTPUT)
+			.build();
+
+		ChatClient mutatedChatClient = defaultChatClient.mutate().build();
+
+		ChatClient.ChatClientRequestSpec prompt = mutatedChatClient.prompt();
+
+		assertThat(((DefaultChatClient.DefaultChatClientRequestSpec) prompt).getAdvisorParams())
+			.containsKey(ChatClientAttributes.STRUCTURED_OUTPUT_NATIVE.getKey());
+	}
+
 	@Test
 	void mutatePrompt() {