diff --git a/code/MSSQLDatabase.php b/code/MSSQLDatabase.php
index 644520c..0a33316 100644
--- a/code/MSSQLDatabase.php
+++ b/code/MSSQLDatabase.php
@@ -835,10 +835,7 @@ class MSSQLDatabase extends SS_Database {
 
 		if(!is_array($indexSpec)) {
 			$indexSpec=trim($indexSpec, '()');
-			$bits=explode(',', $indexSpec);
-			$indexes="\"" . implode("\",\"", $bits) . "\"";
-
-			return "$drop CREATE INDEX $index ON \"" . $tableName . "\" (" . $indexes . ");";
+			return "$drop CREATE INDEX $index ON \"" . $tableName . "\" (" . $indexSpec . ");";
 		} else {
 			// create a type-specific index
 			if($indexSpec['type'] == 'fulltext') {