diff --git a/search-filter.php b/search-filter.php
index 721d26e..88a5234 100644
--- a/search-filter.php
+++ b/search-filter.php
@@ -547,7 +547,7 @@ public function set_defaults()
 
 			//grab search term for prefilling search input
 			if(isset($wp_query->query['s']))
-			{//!"£$%^&*()
+			{//!"£$%^&*()
 				$this->searchterm = trim(get_search_query());
 			}
 
@@ -876,7 +876,7 @@ public function check_posts()
 					{
 						$this->urlparams .= "&";
 					}
-					$this->urlparams .= "post_types=".$post_types;
+					$this->urlparams .= "post_type=".$post_types;
 
 				}
 			}
@@ -1721,4 +1721,4 @@ function walk_taxonomy( $type = "checkbox", $args = array() ) {
 require_once(SEARCHANDFILTER_PLUGIN_DIR."/of-admin.php");
 
 
-?>
\ No newline at end of file
+?>