Index: oox/source/xls/stylesbuffer.cxx
===================================================================
--- oox/source/xls/stylesbuffer.cxx	(revision 1373256)
+++ oox/source/xls/stylesbuffer.cxx	(working copy)
@@ -3052,7 +3052,9 @@
 
     /*  Calculate names of user defined styles. Store styles with reserved
         names in the aConflictNameStyles list. */
-    for( CellStyleVector::iterator aIt = maUserStyles.begin(), aEnd = maUserStyles.end(); aIt != aEnd; ++aIt )
+    // 4050 comes from sc module:  EXC_XF_MAXCOUNT = 4050;     /// Maximum number of all XF records.
+    const CellStyleVector::const_iterator aEnd = (maUserStyles.size() > 4050) ? (maUserStyles.begin() + 4050) : maUserStyles.end();
+    for( CellStyleVector::iterator aIt = maUserStyles.begin(); aIt != aEnd; ++aIt )
     {
         const CellStyleModel& rModel = (*aIt)->getModel();
         OUString aStyleName = lclCreateStyleName( rModel );