diff --git a/src/java/org/apache/poi/hssf/record/RecordFactory.java b/src/java/org/apache/poi/hssf/record/RecordFactory.java
index 4a1ce1933..7df806e79 100644
--- a/src/java/org/apache/poi/hssf/record/RecordFactory.java
+++ b/src/java/org/apache/poi/hssf/record/RecordFactory.java
@@ -106,7 +106,7 @@ public class RecordFactory
                 WindowTwoRecord.class, SelectionRecord.class, ContinueRecord.class,
                 LabelRecord.class, BlankRecord.class, ColumnInfoRecord.class,
                 MulRKRecord.class, MulBlankRecord.class, MergeCellsRecord.class,
-                FormulaRecord.class, BoolErrRecord.class
+                FormulaRecord.class, BoolErrRecord.class, ExternSheetRecord.class
             };
         } else {
             records = new Class[]
@@ -134,7 +134,7 @@ public class RecordFactory
                 WindowTwoRecord.class, SelectionRecord.class, ContinueRecord.class,
                 LabelRecord.class, BlankRecord.class, ColumnInfoRecord.class,
                 MulRKRecord.class, MulBlankRecord.class, MergeCellsRecord.class,
-                BoolErrRecord.class
+                BoolErrRecord.class, ExternSheetRecord.class
             };
             
         }