diff --git a/core/modules/search/lib/Drupal/search/SearchQuery.php b/core/modules/search/lib/Drupal/search/SearchQuery.php
index b49c06a..668ca14 100644
--- a/core/modules/search/lib/Drupal/search/SearchQuery.php
+++ b/core/modules/search/lib/Drupal/search/SearchQuery.php
@@ -413,6 +413,7 @@ public function addScore($score, $arguments = array(), $multiply = FALSE) {
    */
   public function execute()
   {
+
     if (!$this->executedFirstPass) {
       $this->executeFirstPass();
     }
@@ -440,8 +441,12 @@ public function execute()
       }
     }
 
+    // Format the float to make sure that the decimal separator is a period
+    // no matter what the numeric locale is set to. This is so the database
+    // query will not fail.
+    $relevance = number_format((1.0 / $this->normalize), 10, '.', '');
     // Replace i.relevance pseudo-field with the actual, normalized value.
-    $this->scores = str_replace('i.relevance', '(' . (1.0 / $this->normalize) . ' * i.score * t.count)', $this->scores);
+    $this->scores = str_replace('i.relevance', '(' . $relevance . ' * i.score * t.count)', $this->scores);
     // Convert scores to an expression.
     $this->addExpression('SUM(' . implode(' + ', $this->scores) . ')', 'calculated_score', $this->scoresArguments);
 
@@ -455,7 +460,6 @@ public function execute()
       ->addTag('search_' . $this->type)
       ->addMetaData('normalize', $this->normalize)
       ->fields('i', array('type', 'sid'));
-
     return $this->query->execute();
   }