diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java
index 89eea85fda..ce216d7ad4 100644
--- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java
+++ b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java
@@ -238,6 +238,7 @@ public class MergeContent extends BinFiles {
             .description("If specified, like FlowFiles will be binned together, where 'like FlowFiles' means FlowFiles that have the same value for "
                     + "this Attribute. If not specified, FlowFiles are bundled by the order in which they are pulled from the queue.")
             .required(false)
+            .expressionLanguageSupported(true)
             .addValidator(StandardValidators.ATTRIBUTE_KEY_VALIDATOR)
             .defaultValue(null)
             .build();
@@ -376,7 +377,8 @@ public class MergeContent extends BinFiles {
 
     @Override
     protected String getGroupId(final ProcessContext context, final FlowFile flowFile) {
-        final String correlationAttributeName = context.getProperty(CORRELATION_ATTRIBUTE_NAME).getValue();
+        final String correlationAttributeName = context.getProperty(CORRELATION_ATTRIBUTE_NAME)
+                .evaluateAttributeExpressions(flowFile).getValue();
         String groupId = correlationAttributeName == null ? null : flowFile.getAttribute(correlationAttributeName);
 
         // when MERGE_STRATEGY is Defragment and correlationAttributeName is null then bin by fragment.identifier