diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index e1c8416bcff..8d66fd2dcf8 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -33,8 +33,13 @@ Apache ZooKeeper 3.4.5
 Upgrading from Solr 4.x
 ----------------------
 
-The "file" attribute of infoStream in solrconfig.xml is removed. Control this 
-via your logging configuration (org.apache.solr.update.LoggingInfoStream) instead.
+* The "file" attribute of infoStream in solrconfig.xml is removed. Control this 
+  via your logging configuration (org.apache.solr.update.LoggingInfoStream) instead.
+
+* UniqFieldsUpdateProcessorFactory no longer supports the <lst named="fields"> init
+  param style that was deprecated in Solr 4.5.  If you are still using this syntax, 
+  update your configs to use <arr name="fieldName"> instead. See SOLR-4249 for more 
+  details.
 
 Detailed Change List
 ----------------------
diff --git a/solr/core/src/java/org/apache/solr/update/processor/UniqFieldsUpdateProcessorFactory.java b/solr/core/src/java/org/apache/solr/update/processor/UniqFieldsUpdateProcessorFactory.java
index 42620df27e4..13d497b5bcc 100644
--- a/solr/core/src/java/org/apache/solr/update/processor/UniqFieldsUpdateProcessorFactory.java
+++ b/solr/core/src/java/org/apache/solr/update/processor/UniqFieldsUpdateProcessorFactory.java
@@ -67,22 +67,6 @@ public class UniqFieldsUpdateProcessorFactory extends FieldValueSubsetUpdateProc
     return FieldMutatingUpdateProcessor.SELECT_NO_FIELDS;
   }
 
-  @SuppressWarnings("unchecked")
-  @Override
-  public void init(@SuppressWarnings("rawtypes") NamedList args) {
-    // legacy init param support, will be removed in 5.0
-    // no idea why this was ever implimented as <lst> should have just been <arr>
-    NamedList<String> flst = (NamedList<String>) args.remove("fields");
-    if(flst != null){
-      log.warn("Use of the 'fields' init param in UniqFieldsUpdateProcessorFactory is deprecated, please use 'fieldName' (or another FieldMutatingUpdateProcessorFactory selector option) instead");
-      log.info("Replacing 'fields' init param with (individual) 'fieldName' params");
-      for (Map.Entry<String,String> entry : flst) {
-        args.add("fieldName", entry.getValue());
-      }
-    }
-    super.init(args);
-  }
-  
   @Override
   @SuppressWarnings("unchecked")
   public Collection pickSubset(Collection values) {
diff --git a/solr/core/src/test-files/solr/collection1/conf/solrconfig.xml b/solr/core/src/test-files/solr/collection1/conf/solrconfig.xml
index da6bb36929a..810aa1d312e 100644
--- a/solr/core/src/test-files/solr/collection1/conf/solrconfig.xml
+++ b/solr/core/src/test-files/solr/collection1/conf/solrconfig.xml
@@ -518,11 +518,11 @@
   </updateRequestProcessorChain>
   <updateRequestProcessorChain name="uniq-fields">
     <processor class="org.apache.solr.update.processor.UniqFieldsUpdateProcessorFactory">
-      <lst name="fields">
+      <arr name="fieldName">
         <str>uniq</str>
         <str>uniq2</str>
         <str>uniq3</str>
-      </lst>      
+      </arr>      
     </processor>
     <processor class="solr.RunUpdateProcessorFactory" />
   </updateRequestProcessorChain>