diff --git a/table/integration/src/main/java/com/riiablo/table/schema/MonStatsParserImpl.java b/table/integration/src/main/java/com/riiablo/table/schema/MonStatsParserImpl.java
index 2f29e612..d3d57ec6 100644
--- a/table/integration/src/main/java/com/riiablo/table/schema/MonStatsParserImpl.java
+++ b/table/integration/src/main/java/com/riiablo/table/schema/MonStatsParserImpl.java
@@ -1,22 +1,29 @@
 package com.riiablo.table.schema;
 
 import java.io.IOException;
-import javax.annotation.Generated;
 
 import com.riiablo.table.Parser;
 import com.riiablo.table.TsvParser;
 
-public abstract class MonStatsParserImpl implements Parser<MonStats> {
+public class MonStatsParserImpl implements Parser<MonStats> {
+  int[] fieldIds = new int[5];
+
   @Override
   public boolean hasNext(TsvParser parser) throws IOException {
     return parser.cacheLine() != -1;
   }
 
+  @Override
+  public void parseFields(TsvParser parser) {
+    fieldIds[0] = parser.fieldId("A1MaxD1");
+    fieldIds[1] = parser.fieldId("A1MaxD2");
+  }
+
   // TODO: performance improvement of sorting calls by fieldId
   //       create Function[numFields]: (record) -> record.<field> = parser.parse<type>(fieldId)
-  @Generated(value = "")
+  @Override
   public void parseRecord(final MonStats record, final TsvParser parser) {
-    record.A1MaxD[0] = parser.parseInt(0);
-    record.A1MaxD[1] = parser.parseInt(5);
+    record.A1MaxD[0] = parser.parseInt(fieldIds[0]);
+    record.A1MaxD[1] = parser.parseInt(fieldIds[1]);
   }
 }