diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 6ac4aef338..78a364acb0 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -251,8 +251,8 @@ class WP_Comment_Query {
 		$key = md5( serialize( compact(array_keys($defaults)) )  );
 		$last_changed = wp_cache_get( 'last_changed', 'comment' );
 		if ( ! $last_changed ) {
-			wp_cache_set( 'last_changed', 1, 'comment' );
 			$last_changed = 1;
+			wp_cache_set( 'last_changed', $last_changed, 'posts' );
 		}
 		$cache_key = "get_comments:$key:$last_changed";
 
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 0ae90a3d54..959591aaa3 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -3653,8 +3653,8 @@ function get_pages($args = '') {
 	$key = md5( serialize( compact(array_keys($defaults)) ) );
 	$last_changed = wp_cache_get( 'last_changed', 'posts' );
 	if ( ! $last_changed ) {
-		wp_cache_set( 'last_changed', 1, 'posts' );
 		$last_changed = 1;
+		wp_cache_set( 'last_changed', $last_changed, 'posts' );
 	}
 
 	$cache_key = "get_pages:$key:$last_changed";