diff --git a/lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java b/lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java
index 78ad8836d3a..3039abea633 100644
--- a/lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java
+++ b/lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java
@@ -30,15 +30,14 @@ import org.apache.lucene.index.codecs.PostingsReaderBase;
 import org.apache.lucene.index.codecs.standard.StandardPostingsReader;
 import org.apache.lucene.index.codecs.FieldsConsumer;
 import org.apache.lucene.index.codecs.FieldsProducer;
-import org.apache.lucene.index.codecs.FixedGapTermsIndexReader;
-import org.apache.lucene.index.codecs.FixedGapTermsIndexWriter;
+import org.apache.lucene.index.codecs.VariableGapTermsIndexReader;
+import org.apache.lucene.index.codecs.VariableGapTermsIndexWriter;
 import org.apache.lucene.index.codecs.BlockTermsReader;
 import org.apache.lucene.index.codecs.BlockTermsWriter;
 import org.apache.lucene.index.codecs.TermsIndexReaderBase;
 import org.apache.lucene.index.codecs.TermsIndexWriterBase;
 import org.apache.lucene.index.codecs.standard.StandardCodec;
 import org.apache.lucene.store.Directory;
-import org.apache.lucene.util.BytesRef;
 
 /** This codec "inlines" the postings for terms that have
  *  low docFreq.  It wraps another codec, which is used for
@@ -78,7 +77,7 @@ public class PulsingCodec extends Codec {
     TermsIndexWriterBase indexWriter;
     boolean success = false;
     try {
-      indexWriter = new FixedGapTermsIndexWriter(state);
+      indexWriter = new VariableGapTermsIndexWriter(state, new VariableGapTermsIndexWriter.EveryNTermSelector(state.termIndexInterval));
       success = true;
     } finally {
       if (!success) {
@@ -116,12 +115,11 @@ public class PulsingCodec extends Codec {
 
     boolean success = false;
     try {
-      indexReader = new FixedGapTermsIndexReader(state.dir,
-                                                       state.fieldInfos,
-                                                       state.segmentInfo.name,
-                                                       state.termsIndexDivisor,
-                                                       BytesRef.getUTF8SortedAsUnicodeComparator(),
-                                                       state.codecId);
+      indexReader = new VariableGapTermsIndexReader(state.dir,
+                                                    state.fieldInfos,
+                                                    state.segmentInfo.name,
+                                                    state.termsIndexDivisor,
+                                                    state.codecId);
       success = true;
     } finally {
       if (!success) {
@@ -155,7 +153,7 @@ public class PulsingCodec extends Codec {
   public void files(Directory dir, SegmentInfo segmentInfo, String id, Set<String> files) throws IOException {
     StandardPostingsReader.files(dir, segmentInfo, id, files);
     BlockTermsReader.files(dir, segmentInfo, id, files);
-    FixedGapTermsIndexReader.files(dir, segmentInfo, id, files);
+    VariableGapTermsIndexReader.files(dir, segmentInfo, id, files);
   }
 
   @Override