diff --git a/libs/plugins/function.eval.php b/libs/plugins/function.eval.php
index fd65e2e2..acdaf64d 100644
--- a/libs/plugins/function.eval.php
+++ b/libs/plugins/function.eval.php
@@ -25,21 +25,21 @@ function smarty_function_eval($params, &$smarty)
         return;
     }
 
-	if($params['var'] == '') {
-		return;
-	}
+    if($params['var'] == '') {
+        return;
+    }
 
-	$smarty->_compile_source('evaluated template', $params['var'], $_var_compiled);
+    $smarty->_compile_source('evaluated template', $params['var'], $_var_compiled);
 
     ob_start();
-	$smarty->smarty_eval('?>' . $_var_compiled);
-	$_contents = ob_get_contents();
+    $smarty->smarty_eval('?>' . $_var_compiled);
+    $_contents = ob_get_contents();
     ob_end_clean();
 
-    if (!empty($assign)) {
-    	$smarty->assign($assign, $_contents);
+    if (!empty($params['assign'])) {
+        $smarty->assign($params['assign'], $_contents);
     } else {
-		return $_contents;
+        return $_contents;
     }
 }