--- src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java	(revision 1777033)
+++ src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java	(working copy)
@@ -256,7 +256,6 @@ 
         if(fromCol.isSetCollapsed()) toCol.setCollapsed(fromCol.getCollapsed());
         if(fromCol.isSetPhonetic()) toCol.setPhonetic(fromCol.getPhonetic());
         if(fromCol.isSetOutlineLevel()) toCol.setOutlineLevel(fromCol.getOutlineLevel());
-        toCol.setCollapsed(fromCol.isSetCollapsed());
     }
 
     public void setColBestFit(long index, boolean bestFit) {