diff --git a/wp-includes/class-wp-object-query.php b/wp-includes/class-wp-object-query.php
index 5d4dd025a..67524bb00 100644
--- a/wp-includes/class-wp-object-query.php
+++ b/wp-includes/class-wp-object-query.php
@@ -70,32 +70,6 @@ class WP_Object_Query {
 
 		$qv['meta_query'] = $meta_query;
 	}
-
-	/*
-	 * Used internally to generate an SQL string for searching across multiple columns
-	 *
-	 * @access protected
-	 * @since 3.1.0
-	 *
-	 * @param string $string
-	 * @param array $cols
-	 * @param bool $wild Whether to allow trailing wildcard searches. Default is false.
-	 * @return string
-	 */
-	function get_search_sql( $string, $cols, $wild = false ) {
-		$string = esc_sql( $string );
-
-		$searches = array();
-		$wild_char = ( $wild ) ? '%' : '';
-		foreach ( $cols as $col ) {
-			if ( 'ID' == $col )
-				$searches[] = "$col = '$string'";
-			else
-				$searches[] = "$col LIKE '$string$wild_char'";
-		}
-
-		return ' AND (' . implode(' OR ', $searches) . ')';
-	}
 }
 
 ?>
diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 071a3faf8..3980ab1e9 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -341,6 +341,26 @@ class WP_Comment_Query extends WP_Object_Query {
 
 		return $comments;
 	}
+
+	/*
+	 * Used internally to generate an SQL string for searching across multiple columns
+	 *
+	 * @access protected
+	 * @since 3.1.0
+	 *
+	 * @param string $string
+	 * @param array $cols
+	 * @return string
+	 */
+	function get_search_sql( $string, $cols ) {
+		$string = esc_sql( $string );
+
+		$searches = array();
+		foreach ( $cols as $col )
+			$searches[] = "$col LIKE '%$string%'";
+
+		return ' AND (' . implode(' OR ', $searches) . ')';
+	}
 }
 
 /**
diff --git a/wp-includes/user.php b/wp-includes/user.php
index fc6913ba4..22bc85b08 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -526,6 +526,32 @@ class WP_User_Query extends WP_Object_Query {
 		}
 	}
 
+	/*
+	 * Used internally to generate an SQL string for searching across multiple columns
+	 *
+	 * @access protected
+	 * @since 3.1.0
+	 *
+	 * @param string $string
+	 * @param array $cols
+	 * @param bool $wild Whether to allow trailing wildcard searches. Default is false.
+	 * @return string
+	 */
+	function get_search_sql( $string, $cols, $wild = false ) {
+		$string = esc_sql( $string );
+
+		$searches = array();
+		$wild_char = ( $wild ) ? '%' : '';
+		foreach ( $cols as $col ) {
+			if ( 'ID' == $col )
+				$searches[] = "$col = '$string'";
+			else
+				$searches[] = "$col LIKE '$string$wild_char'";
+		}
+
+		return ' AND (' . implode(' OR ', $searches) . ')';
+	}
+
 	/**
 	 * Return the list of users
 	 *