diff --git a/Documentation/FunctionListByCategory.txt b/Documentation/FunctionListByCategory.txt
index a5423eb..1c3ec5c 100644
--- a/Documentation/FunctionListByCategory.txt
+++ b/Documentation/FunctionListByCategory.txt
@@ -177,7 +177,7 @@ CATEGORY_LOOKUP_AND_REFERENCE
 	COLUMN                  PHPExcel_Calculation_LookupRef::COLUMN
 	COLUMNS                 PHPExcel_Calculation_LookupRef::COLUMNS
 	GETPIVOTDATA            ***  Not yet Implemented
-	HLOOKUP                 ***  Not yet Implemented
+	HLOOKUP                 PHPExcel_Calculation_LookupRef::HLOOKUP
 	HYPERLINK               PHPExcel_Calculation_LookupRef::HYPERLINK
 	INDEX                   PHPExcel_Calculation_LookupRef::INDEX
 	INDIRECT                PHPExcel_Calculation_LookupRef::INDIRECT
diff --git a/Documentation/FunctionListByName.txt b/Documentation/FunctionListByName.txt
index 082c83a..02e2f06 100644
--- a/Documentation/FunctionListByName.txt
+++ b/Documentation/FunctionListByName.txt
@@ -146,7 +146,7 @@ HARMEAN                 CATEGORY_STATISTICAL            PHPExcel_Calculation_Sta
 HEX2BIN                 CATEGORY_ENGINEERING            PHPExcel_Calculation_Engineering::HEXTOBIN
 HEX2DEC                 CATEGORY_ENGINEERING            PHPExcel_Calculation_Engineering::HEXTODEC
 HEX2OCT                 CATEGORY_ENGINEERING            PHPExcel_Calculation_Engineering::HEXTOOCT
-HLOOKUP                 CATEGORY_LOOKUP_AND_REFERENCE   ***  Not yet Implemented
+HLOOKUP                 CATEGORY_LOOKUP_AND_REFERENCE   PHPExcel_Calculation_LookupRef::HLOOKUP
 HOUR                    CATEGORY_DATE_AND_TIME          PHPExcel_Calculation_DateTime::HOUROFDAY
 HYPERLINK               CATEGORY_LOOKUP_AND_REFERENCE   PHPExcel_Calculation_LookupRef::HYPERLINK
 HYPGEOMDIST             CATEGORY_STATISTICAL            PHPExcel_Calculation_Statistical::HYPGEOMDIST