diff --git a/lucene/core/src/java/org/apache/lucene/index/PointValuesWriter.java b/lucene/core/src/java/org/apache/lucene/index/PointValuesWriter.java
index ce7e5787d53..dcc760049c6 100644
--- a/lucene/core/src/java/org/apache/lucene/index/PointValuesWriter.java
+++ b/lucene/core/src/java/org/apache/lucene/index/PointValuesWriter.java
@@ -164,6 +164,6 @@ class PointValuesWriter {
       }
     };
 
-    writer.writeField(fieldInfo, reader, Math.max(indexWriterConfig.getRAMBufferSizeMB()/8.0));
+    writer.writeField(fieldInfo, reader);
   }
 }