diff --git a/src/testcases/org/apache/poi/hssf/data/43251.xls b/src/testcases/org/apache/poi/hssf/data/43251.xls
new file mode 100644
index 000000000..abc476ab0
Binary files /dev/null and b/src/testcases/org/apache/poi/hssf/data/43251.xls differ
diff --git a/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java b/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
index e7eff83e6..b534a8bbf 100644
--- a/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
+++ b/src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java
@@ -1136,6 +1136,20 @@ extends TestCase {
         //assertEquals("=CHOOSE(2,A2,A3,A4)", c2.getCellFormula());
     }
     
+    /**
+     * Something up with the FileSharingRecord
+     */
+    public void test43251() throws Exception {
+        FileInputStream in = new FileInputStream(new File(cwd, "43251.xls"));
+        
+        // Used to blow up with an IllegalArgumentException
+        //  when creating a FileSharingRecord
+        HSSFWorkbook wb = new HSSFWorkbook(in);
+        in.close();
+        
+        assertEquals(1, wb.getNumberOfSheets());
+    }
+    
     /**
      * Crystal reports generates files with short 
      *  StyleRecords, which is against the spec