diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entwxpay/EntWxEmpPayRequest.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entwxpay/EntWxEmpPayRequest.java
index 193c5293f7..e093a818da 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entwxpay/EntWxEmpPayRequest.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entwxpay/EntWxEmpPayRequest.java
@@ -227,4 +227,9 @@ protected void storeMap(Map<String, String> map) {
     map.put("approval_type", approvalType.toString());
     map.put("agentid", agentId.toString());
   }
+
+  @Override
+  protected String[] getIgnoredParamsForSign() {
+    return new String[]{"sign_type"};
+  }
 }