diff --git a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/toolkit/log/log4j/v1/x/TraceIdPatternParser.java b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/toolkit/log/log4j/v1/x/TraceIdPatternParser.java
index 19c8550081b13c4403f4ca06f00c66a1de9142af..9ca4d405caf17eecf4ccc0228131be797d27121b 100644
--- a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/toolkit/log/log4j/v1/x/TraceIdPatternParser.java
+++ b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/toolkit/log/log4j/v1/x/TraceIdPatternParser.java
@@ -13,7 +13,7 @@ public class TraceIdPatternParser extends PatternParser {
 
     @Override
     protected void finalizeConverter(char c) {
-        if ('x' == c) {
+        if ('T' == c) {
             addConverter(new TraceIdPatternConverter());
         } else {
             super.finalizeConverter(c);