diff --git a/discovery-agent-starter/src/main/java/com/nepxion/discovery/agent/plugin/thread/ThreadPlugin.java b/discovery-agent-starter/src/main/java/com/nepxion/discovery/agent/plugin/thread/ThreadPlugin.java
index da00f58..4c33014 100644
--- a/discovery-agent-starter/src/main/java/com/nepxion/discovery/agent/plugin/thread/ThreadPlugin.java
+++ b/discovery-agent-starter/src/main/java/com/nepxion/discovery/agent/plugin/thread/ThreadPlugin.java
@@ -52,7 +52,6 @@ public void install(TransformTemplate transformTemplate) {
 
         List<String> basePackages = StringUtil.tokenizeToStringList(baseThreadScanPackages, ThreadConstant.THREAD_SCAN_PACKAGES_DELIMITERS);
         List<String> customPackages = StringUtil.tokenizeToStringList(threadScanPackages, ThreadConstant.THREAD_SCAN_PACKAGES_DELIMITERS);
-        basePackages.addAll(customPackages);
         HashSet<String> scanPackages = new HashSet<>();
         scanPackages.addAll(basePackages);
         scanPackages.addAll(customPackages);