diff --git a/inc/toolbox.php b/inc/toolbox.php
index 3e5b6ee..c96a8f2 100644
--- a/inc/toolbox.php
+++ b/inc/toolbox.php
@@ -177,7 +177,7 @@ class ToolBox
 		elseif(!array_key_exists('extension', $asOutInfo)) $sOutPath .= '.'.$sImageExt; //folder + filename, but getting ext from file info
 		
 		//New sizes
-		if(!in_array($sImageExt, $asImageExts)) $asResult['error'] = 'Wrong file type';
+		if(!in_array($sImageExt, $asImageExts)) $asResult['error'] = 'Wrong file type: '.$sImageExt;
 		else
 		{
 			list($iWidth, $iHeight) = getimagesize($sInPath);