diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/logging/SystemOutWriter.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/logging/SystemOutWriter.java
index fce01021c..bcd6f3544 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/logging/SystemOutWriter.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/logging/SystemOutWriter.java
@@ -35,7 +35,7 @@ public enum SystemOutWriter implements IWriter {
         out.println(message);
     }
 
-    public PrintStream getStream(){
+    public PrintStream getStream() {
         return System.out;
     }
 }