diff --git a/sorting/formatted-numbers.js b/sorting/formatted-numbers.js
index c1b9d45..71307b0 100644
--- a/sorting/formatted-numbers.js
+++ b/sorting/formatted-numbers.js
@@ -8,16 +8,16 @@
  */
 
 jQuery.extend( jQuery.fn.dataTableExt.oSort, {
-	"formatted_numbers-pre": function ( a ) {
+	"formatted-num-pre": function ( a ) {
 		a = (a==="-") ? 0 : a.replace( /[^\d\-\.]/g, "" );
 		return parseFloat( a );
 	},
 
-	"formatted_numbers-asc": function ( a, b ) {
+	"formatted-num-asc": function ( a, b ) {
 		return a - b;
 	},
 
-	"formatted_numbers-desc": function ( a, b ) {
+	"formatted-num-desc": function ( a, b ) {
 		return b - a;
 	}
 } );
diff --git a/type-detection/formatted-num.js b/type-detection/formatted-num.js
index 1266efc..4148127 100644
--- a/type-detection/formatted-num.js
+++ b/type-detection/formatted-num.js
@@ -14,7 +14,7 @@ jQuery.fn.dataTableExt.aTypes.unshift(
 	function ( sData )
 	{
 		var deformatted = sData.replace(/[^\d\-\.\/a-zA-Z]/g,'');
-		if ( $.isNumeric( deformatted ) ) {
+		if ( $.isNumeric( deformatted ) || deformatted === "-" ) {
 			return 'formatted-num';
 		}
 		return null;