diff --git a/wp-includes/class-wp-tax-query.php b/wp-includes/class-wp-tax-query.php
index 9bff196f28..b46aede70a 100644
--- a/wp-includes/class-wp-tax-query.php
+++ b/wp-includes/class-wp-tax-query.php
@@ -623,7 +623,12 @@ class WP_Tax_Query {
 					 * matter because `sanitize_term_field()` ignores the $term_id param when the
 					 * context is 'db'.
 					 */
-					$term = "'" . esc_sql( sanitize_term_field( $query['field'], $term, 0, $query['taxonomy'], 'db' ) ) . "'";
+					$clean_term = sanitize_term_field( $query['field'], $term, 0, $query['taxonomy'], 'db' );
+
+					// Match sanitization in wp_insert_term().
+					$clean_term = wp_unslash( $clean_term );
+
+					$term = "'" . esc_sql( $clean_term ) . "'";
 				}
 
 				$terms = implode( ",", $query['terms'] );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3745cc060c..e040f0df69 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39660';
+$wp_version = '4.8-alpha-39662';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.