From 3b0231bc4d08d612848bcbc706f90d424a167392 Mon Sep 17 00:00:00 2001
From: Phil Clay <philsttr@users.noreply.github.com>
Date: Thu, 18 Sep 2025 10:47:03 -0600
Subject: [PATCH] use mdc AttributeKey from captureMdcAttributes

---
 .../instrumentation/log4j/appender/v1_2/LogEventMapper.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/instrumentation/log4j/log4j-appender-1.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/log4j/appender/v1_2/LogEventMapper.java b/instrumentation/log4j/log4j-appender-1.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/log4j/appender/v1_2/LogEventMapper.java
index 29614d9f4f..9589d9cb6f 100644
--- a/instrumentation/log4j/log4j-appender-1.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/log4j/appender/v1_2/LogEventMapper.java
+++ b/instrumentation/log4j/log4j-appender-1.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/log4j/appender/v1_2/LogEventMapper.java
@@ -189,7 +189,7 @@ public final class LogEventMapper {
 
     for (Map.Entry<String, AttributeKey<String>> entry : captureMdcAttributes.entrySet()) {
       Object value = context.get(entry.getKey());
-      setAttributeOrEventName(builder, getMdcAttributeKey(entry.getKey()), value);
+      setAttributeOrEventName(builder, entry.getValue(), value);
     }
   }