diff --git a/src/documentation/content/xdocs/status.xml b/src/documentation/content/xdocs/status.xml
index 27aa73f5f..94337a2b8 100644
--- a/src/documentation/content/xdocs/status.xml
+++ b/src/documentation/content/xdocs/status.xml
@@ -34,6 +34,7 @@
 
     <changes>
         <release version="3.7-beta4" date="2010-??-??">
+           <action dev="poi-developers" type="fix">50020 - Avoid IllegalStateException when creating Data validation in sheet with macro</action>
            <action dev="poi-developers" type="fix">50033 - Improved rounding in MOD</action>
            <action dev="poi-developers" type="add">Generate SHA1 hashes of distribution files, alongside existing MD5 ones</action>
         </release>
diff --git a/src/java/org/apache/poi/hssf/model/RecordOrderer.java b/src/java/org/apache/poi/hssf/model/RecordOrderer.java
index 31c25db85..b7d942e5d 100644
--- a/src/java/org/apache/poi/hssf/model/RecordOrderer.java
+++ b/src/java/org/apache/poi/hssf/model/RecordOrderer.java
@@ -333,6 +333,8 @@ final class RecordOrderer {
 			// ConditionalFormattingTable
 			case HyperlinkRecord.sid:
 			case UnknownRecord.QUICKTIP_0800:
+            // name of a VBA module    
+            case UnknownRecord.CODENAME_1BA:
 				return true;
 		}
 		return false;
diff --git a/src/java/org/apache/poi/hssf/record/UnknownRecord.java b/src/java/org/apache/poi/hssf/record/UnknownRecord.java
index 3e04d0f8b..963810f74 100644
--- a/src/java/org/apache/poi/hssf/record/UnknownRecord.java
+++ b/src/java/org/apache/poi/hssf/record/UnknownRecord.java
@@ -57,6 +57,7 @@ public final class UnknownRecord extends StandardRecord {
 	public static final int SHEETEXT_0862        = 0x0862; // OOO calls this SHEETLAYOUT
 	public static final int SHEETPROTECTION_0867 = 0x0867;
 	public static final int HEADER_FOOTER_089C   = 0x089C;
+    public static final int CODENAME_1BA         = 0x01BA;
 
 	private int _sid;
 	private byte[] _rawData;
diff --git a/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java b/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
index 7c83d0b4a..a851ba15a 100644
--- a/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
+++ b/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
@@ -1886,4 +1886,12 @@ if(1==2) {
              "BlahBlah blah blah  ", f.getCenter()
        );
     }
+
+    /**
+     * IllegalStateException received when creating Data validation in sheet with macro
+     */
+    public void test50020() throws Exception {
+       HSSFWorkbook wb = openSample("50020.xls");
+       writeOutAndReadBack(wb);
+    }
 }
diff --git a/test-data/spreadsheet/50020.xls b/test-data/spreadsheet/50020.xls
new file mode 100644
index 000000000..9f4001ef2
Binary files /dev/null and b/test-data/spreadsheet/50020.xls differ