diff --git a/edit-comic.php b/edit-comic.php
index c6c36f2..24a1b2c 100644
--- a/edit-comic.php
+++ b/edit-comic.php
@@ -41,7 +41,8 @@ if( $_POST ) {
 			// get image type and target extension
 			$imagedata = getimagesize($_FILES['comicFile']['tmp_name']);
 			$strip->media = $imagedata[2];
-			$fileext = $dbConnection->fetchColumn('SELECT extension FROM media_t WHERE id = ?', array($strip->media), array(PDO::PARAM_INT));
+			$fileext = $dbConnection->fetchColumn('SELECT extension FROM media_t WHERE id = ?', array($strip->media), 0, array(PDO::PARAM_INT));
+			var_dump($fileext);
 
 			if(strlen($fileext) < 3)
 			{
diff --git a/include/strip.php b/include/strip.php
index c85eb05..a313eb3 100644
--- a/include/strip.php
+++ b/include/strip.php
@@ -22,8 +22,8 @@ class Strip
 function insertstrip(&$strip) {
 	global $dbConnection;
 
-	$strip->book = ($strip->book == '') ? 'NULL' : (int)$strip->book;
-	$strip->page = ($strip->page == '') ? 'NULL' : (int)$strip->page;
+	$strip->book = ($strip->book == '') ? NULL : (int)$strip->book;
+	$strip->page = ($strip->page == '') ? NULL : (int)$strip->page;
 
 	$dbConnection->beginTransaction();
 	$newid = $dbConnection->fetchColumn('SELECT MAX(id) FROM strip') + 1;