diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index 696b4328c7..a67412dc7d 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -2603,7 +2603,7 @@ function wp_ajax_get_revision_diffs() {
 	if ( ! $post = get_post( (int) $_REQUEST['post_id'] ) )
 		wp_send_json_error();
 
-	if ( ! current_user_can( 'read_post', $post->ID ) )
+	if ( ! current_user_can( 'edit_post', $post->ID ) )
 		wp_send_json_error();
 
 	// Really just pre-loading the cache here.
diff --git a/wp-admin/revision.php b/wp-admin/revision.php
index 0f48ef9a27..90c7a8a4af 100644
--- a/wp-admin/revision.php
+++ b/wp-admin/revision.php
@@ -63,7 +63,7 @@ default :
 	if ( ! $post = get_post( $revision->post_parent ) )
 		break;
 
-	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'read_post', $post->ID ) )
+	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'edit_post', $revision->post_parent ) )
 		break;
 
 	// Revisions disabled and we're not looking at an autosave