diff --git a/log4j-slf4j2-impl/src/main/java/org/apache/logging/slf4j/Log4jEventBuilder.java b/log4j-slf4j2-impl/src/main/java/org/apache/logging/slf4j/Log4jEventBuilder.java
index bce6ffdd1504..a9c16f620462 100644
--- a/log4j-slf4j2-impl/src/main/java/org/apache/logging/slf4j/Log4jEventBuilder.java
+++ b/log4j-slf4j2-impl/src/main/java/org/apache/logging/slf4j/Log4jEventBuilder.java
@@ -29,9 +29,10 @@
 import org.apache.logging.log4j.LogBuilder;
 import org.apache.logging.log4j.Logger;
 import org.slf4j.Marker;
+import org.slf4j.spi.CallerBoundaryAware;
 import org.slf4j.spi.LoggingEventBuilder;
 
-public class Log4jEventBuilder implements LoggingEventBuilder {
+public class Log4jEventBuilder implements LoggingEventBuilder, CallerBoundaryAware {
 
     private static final String FQCN = Log4jEventBuilder.class.getName();
 
@@ -43,6 +44,7 @@ public class Log4jEventBuilder implements LoggingEventBuilder {
     private Throwable throwable = null;
     private Map<String, String> keyValuePairs = null;
     private final Level level;
+    private String fqcnOverride;
 
     public Log4jEventBuilder(final Log4jMarkerFactory markerFactory, final Logger logger, final Level level) {
         this.markerFactory = markerFactory;
@@ -110,7 +112,8 @@ public void log() {
                 .withMarker(marker)
                 .withThrowable(throwable);
         if (logBuilder instanceof BridgeAware) {
-            ((BridgeAware) logBuilder).setEntryPoint(FQCN);
+            String fcqn = fqcnOverride != null ? fqcnOverride : FQCN;
+            ((BridgeAware) logBuilder).setEntryPoint(fcqn);
         }
         if (keyValuePairs == null || keyValuePairs.isEmpty()) {
             logBuilder.log(message, arguments.toArray());
@@ -157,4 +160,8 @@ public void log(final Supplier<String> messageSupplier) {
         log();
     }
 
+    @Override
+    public void setCallerBoundary(String fqcn) {
+        fqcnOverride = fqcn;
+    }
 }