diff --git a/core/modules/search/lib/Drupal/search/SearchQuery.php b/core/modules/search/lib/Drupal/search/SearchQuery.php
index 95103a6..95313f8 100644
--- a/core/modules/search/lib/Drupal/search/SearchQuery.php
+++ b/core/modules/search/lib/Drupal/search/SearchQuery.php
@@ -192,6 +192,7 @@ class SearchQuery extends SelectExtender {
    * We build two queries that match the dataset bodies.
    */
   protected function parseSearchExpression() {
+    $this->searchExpression = urldecode($this->searchExpression);
     // Matchs words optionally prefixed by a dash. A word in this case is
     // something between two spaces, optionally quoted.
     preg_match_all('/ (-?)("[^"]+"|[^" ]+)/i', ' ' .  $this->searchExpression , $keywords, PREG_SET_ORDER);
diff --git a/core/modules/search/search.pages.inc b/core/modules/search/search.pages.inc
index ff0d271..a20990f 100644
--- a/core/modules/search/search.pages.inc
+++ b/core/modules/search/search.pages.inc
@@ -16,7 +16,7 @@
 function search_view($module = NULL, $keys = '') {
   $info = FALSE;
   $redirect = FALSE;
-  $keys = trim($keys);
+  $keys = urldecode(trim($keys));
   // Also try to pull search keywords out of the $_REQUEST variable to
   // support old GET format of searches for existing links.
   if (!$keys && !empty($_REQUEST['keys'])) {