diff --git a/config/src/main/java/com/alibaba/nacos/config/server/paramcheck/ConfigListenerHttpParamExtractor.java b/config/src/main/java/com/alibaba/nacos/config/server/paramcheck/ConfigListenerHttpParamExtractor.java
index 78f86ac9d80..0c0a2eff885 100644
--- a/config/src/main/java/com/alibaba/nacos/config/server/paramcheck/ConfigListenerHttpParamExtractor.java
+++ b/config/src/main/java/com/alibaba/nacos/config/server/paramcheck/ConfigListenerHttpParamExtractor.java
@@ -59,7 +59,7 @@ public List<ParamInfo> extractParam(HttpServletRequest request) throws NacosRunt
         for (String line : lines) {
             ParamInfo paramInfo = new ParamInfo();
             String[] words = line.split(Character.toString(WORD_SEPARATOR_CHAR));
-            if (words.length < 3 || words.length > 4) {
+            if (words.length < 2 || words.length > 4) {
                 throw new IllegalArgumentException("invalid probeModify");
             }
             paramInfo.setDataId(words[0]);