diff --git a/wp-includes/meta.php b/wp-includes/meta.php
index ead200455f..d1b74d904a 100644
--- a/wp-includes/meta.php
+++ b/wp-includes/meta.php
@@ -953,6 +953,15 @@ class WP_Meta_Query {
 	 */
 	protected $clauses = array();
 
+	/**
+	 * Whether the query contains any OR relations.
+	 *
+	 * @since 4.3.0
+	 * @access protected
+	 * @var bool
+	 */
+	protected $has_or_relation = false;
+
 	/**
 	 * Constructor.
 	 *
@@ -1046,6 +1055,7 @@ class WP_Meta_Query {
 		// Sanitize the 'relation' key provided in the query.
 		if ( isset( $relation ) && 'OR' === strtoupper( $relation ) ) {
 			$clean_queries['relation'] = 'OR';
+			$this->has_or_relation = true;
 
 		/*
 		 * If there is only a single clause, call the relation 'OR'.
@@ -1578,6 +1588,21 @@ class WP_Meta_Query {
 		 */
 		return apply_filters( 'meta_query_find_compatible_table_alias', $alias, $clause, $parent_query, $this ) ;
 	}
+
+	/**
+	 * Check whether the current query has any OR relations.
+	 *
+	 * In some cases, the presence of an OR relation somewhere in the query will require the use of a DISTINCT or
+	 * GROUP BY keyword in the SELECT clause. The current method can be used in these cases to determine whether
+	 * such a clause is necessary.
+	 *
+	 * @since 4.3.0
+	 *
+	 * @return bool True if the query contains any OR relations, otherwise false.
+	 */
+	public function has_or_relation() {
+		return $this->has_or_relation;
+	}
 }
 
 /**
diff --git a/wp-includes/user.php b/wp-includes/user.php
index 2599ce01a9..cb9695cf7b 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -709,7 +709,7 @@ class WP_User_Query {
 			$this->query_from .= $clauses['join'];
 			$this->query_where .= $clauses['where'];
 
-			if ( 'OR' == $this->meta_query->relation ) {
+			if ( $this->meta_query->has_or_relation() ) {
 				$this->query_fields = 'DISTINCT ' . $this->query_fields;
 			}
 		}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e3a0247f95..533fdb63ff 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32712';
+$wp_version = '4.3-alpha-32713';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.