diff --git a/media/js/jquery.dataTables.js b/media/js/jquery.dataTables.js
index 3b4bde20..1da75626 100644
--- a/media/js/jquery.dataTables.js
+++ b/media/js/jquery.dataTables.js
@@ -3796,7 +3796,9 @@
 					sDataType = oSettings.aoColumns[ iColumn ].sSortDataType;
 					if ( DataTable.ext.afnSortData[sDataType] )
 					{
-						var aData = DataTable.ext.afnSortData[sDataType]( oSettings, iColumn, iVisColumn );
+						var aData = DataTable.ext.afnSortData[sDataType].call( 
+							oSettings.oInstance, oSettings, iColumn, iVisColumn
+						);
 						if ( aData.length === aoData.length )
 						{
 							for ( j=0, jLen=aoData.length ; j<jLen ; j++ )
diff --git a/media/src/core/core.sort.js b/media/src/core/core.sort.js
index 570fd965..f6cf11ad 100644
--- a/media/src/core/core.sort.js
+++ b/media/src/core/core.sort.js
@@ -36,7 +36,9 @@ function _fnSort ( oSettings, bApplyClasses )
 			sDataType = oSettings.aoColumns[ iColumn ].sSortDataType;
 			if ( DataTable.ext.afnSortData[sDataType] )
 			{
-				var aData = DataTable.ext.afnSortData[sDataType]( oSettings, iColumn, iVisColumn );
+				var aData = DataTable.ext.afnSortData[sDataType].call( 
+					oSettings.oInstance, oSettings, iColumn, iVisColumn
+				);
 				if ( aData.length === aoData.length )
 				{
 					for ( j=0, jLen=aoData.length ; j<jLen ; j++ )