diff --git a/Classes/PHPExcel/Writer/Excel5.php b/Classes/PHPExcel/Writer/Excel5.php
index 20b094a..1f1e650 100644
--- a/Classes/PHPExcel/Writer/Excel5.php
+++ b/Classes/PHPExcel/Writer/Excel5.php
@@ -223,7 +223,7 @@ class PHPExcel_Writer_Excel5 implements PHPExcel_Writer_IWriter
 			$escher = null;
 
 			// check if there are any shapes for this sheet
-			if (empty($sheet->getDrawingCollection())) {
+			if (count($sheet->getDrawingCollection()) == 0) {
 				continue;
 			}
 
@@ -319,7 +319,7 @@ class PHPExcel_Writer_Excel5 implements PHPExcel_Writer_IWriter
 		// any drawings in this workbook?
 		$found = false;
 		foreach ($this->_phpExcel->getAllSheets() as $sheet) {
-			if (!empty($sheet->getDrawingCollection())) {
+			if (count($sheet->getDrawingCollection()) > 0) {
 				$found = true;
 				break;
 			}
@@ -348,7 +348,7 @@ class PHPExcel_Writer_Excel5 implements PHPExcel_Writer_IWriter
 		foreach ($this->_phpExcel->getAllsheets() as $sheet) {
 			$sheetCountShapes = 0; // count number of shapes (minus group shape), in sheet
 
-			if (!empty($sheet->getDrawingCollection())) {
+			if (count($sheet->getDrawingCollection()) > 0) {
 				++$countDrawings;
 
 				foreach ($sheet->getDrawingCollection() as $drawing) {
diff --git a/Classes/PHPExcel/Writer/Excel5/Workbook.php b/Classes/PHPExcel/Writer/Excel5/Workbook.php
index 304ed23..f8599d5 100644
--- a/Classes/PHPExcel/Writer/Excel5/Workbook.php
+++ b/Classes/PHPExcel/Writer/Excel5/Workbook.php
@@ -643,7 +643,7 @@ class PHPExcel_Writer_Excel5_Workbook extends PHPExcel_Writer_Excel5_BIFFwriter
 		$chunk = '';
 
 		// Named ranges
-		if (!empty($this->_phpExcel->getNamedRanges())) {
+		if (count($this->_phpExcel->getNamedRanges()) > 0) {
 			// Loop named ranges
 			$namedRanges = $this->_phpExcel->getNamedRanges();
 			foreach ($namedRanges as $namedRange) {