diff --git a/Classes/PHPExcel/Calculation.php b/Classes/PHPExcel/Calculation.php
index d7ef873..cbf0954 100644
--- a/Classes/PHPExcel/Calculation.php
+++ b/Classes/PHPExcel/Calculation.php
@@ -3138,7 +3138,7 @@ class PHPExcel_Calculation {
 									$cellValue = $this->extractCellRange($cellRef, $pCellParent->getParent()->getSheetByName($matches[2]), false);
 									$pCell->attach($pCellParent);
 								} else {
-									$cellValue = PHPExcel_Calculation_Functions::REF();
+									$cellValue = NULL;
 								}
 							} else {
 								return $this->_raiseFormulaError('Unable to access Cell Reference');
diff --git a/changelog.txt b/changelog.txt
index ff1ac51..4ca74be 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -38,6 +38,7 @@ Fixed in SVN:
 - Bugfix:   (MBaker) Workitem 14176 - @ format for numeric strings in XLSX to CSV conversion
 - Bugfix:   (MBaker) Workitem 14223 - Advanced Value Binder Not Working?
 - Bugfix:   (MBaker) Workitem 14226 - unassigned object variable in PHPExcel->removeCellXfByIndex
+- Bugfix:   (MBaker) Workitem 14236 - problem with getting cell values from another worksheet... (if cell doesn't exist)
 
 
 2010-08-26 (v1.7.4):