diff --git a/src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java b/src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java
index 0f171d4e99..c1ce05c1bb 100644
--- a/src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java
+++ b/src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java
@@ -120,7 +120,7 @@ final class OperationEvaluatorFactory {
 			EvaluationSheet evalSheet = ec.getWorkbook().getSheet(ec.getSheetIndex());
 		    EvaluationCell evalCell = evalSheet.getCell(ec.getRowIndex(), ec.getColumnIndex());
 
-		    if ((evalCell.isPartOfArrayFormulaGroup() || ec.isInArrayContext()) && result instanceof ArrayFunction)
+		    if (evalCell != null && (evalCell.isPartOfArrayFormulaGroup() || ec.isInArrayContext()) && result instanceof ArrayFunction)
 		        return ((ArrayFunction) result).evaluateArray(args, ec.getRowIndex(), ec.getColumnIndex());
 		                
 			return  result.evaluate(args, ec.getRowIndex(), (short) ec.getColumnIndex());
diff --git a/src/java/org/apache/poi/ss/formula/WorkbookEvaluator.java b/src/java/org/apache/poi/ss/formula/WorkbookEvaluator.java
index 7ba8f614e6..ec7f721d3c 100644
--- a/src/java/org/apache/poi/ss/formula/WorkbookEvaluator.java
+++ b/src/java/org/apache/poi/ss/formula/WorkbookEvaluator.java
@@ -597,7 +597,7 @@ public final class WorkbookEvaluator {
         EvaluationSheet evalSheet = ec.getWorkbook().getSheet(ec.getSheetIndex());
         EvaluationCell evalCell = evalSheet.getCell(ec.getRowIndex(), ec.getColumnIndex());
  
-        if (evalCell.isPartOfArrayFormulaGroup() && evaluationResult instanceof AreaEval) {
+        if (evalCell != null && evalCell.isPartOfArrayFormulaGroup() && evaluationResult instanceof AreaEval) {
             value = OperandResolver.getElementFromArray((AreaEval) evaluationResult, evalCell);
         }
         else {