diff --git a/wp-includes/post.php b/wp-includes/post.php
index ac7412f215..5c61c6d713 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -548,7 +548,9 @@ function add_post_meta($post_id, $meta_key, $meta_value, $unique = false) {
 function delete_post_meta($post_id, $meta_key, $meta_value = '') {
 	global $wpdb;
 
-	$post_id = absint( $post_id );
+	// make sure meta is added to the post, not a revision
+	if ( $the_post = wp_is_post_revision($post_id) )
+		$post_id = $the_post;
 
 	// expected_slashed ($meta_key, $meta_value)
 	$meta_key = stripslashes( $meta_key );
@@ -626,6 +628,10 @@ function get_post_meta($post_id, $key, $single = false) {
 function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {
 	global $wpdb;
 
+	// make sure meta is added to the post, not a revision
+	if ( $the_post = wp_is_post_revision($post_id) )
+		$post_id = $the_post;
+
 	// expected_slashed ($meta_key)
 	$meta_key = stripslashes($meta_key);