diff --git a/wp-post-meta-revisions.php b/wp-post-meta-revisions.php
index de02b12..45e9452 100644
--- a/wp-post-meta-revisions.php
+++ b/wp-post-meta-revisions.php
@@ -134,6 +134,10 @@ public function _wp_save_revisioned_meta_fields( $revision_id ) {
 		foreach ( $this->_wp_post_revision_meta_keys() as $meta_key ) {
 			$meta_value = get_post_meta( $post_id, $meta_key );
 
+			if ( empty( $meta_value ) ) {
+				continue 1;
+			}
+
 			/*
 			 * Use the underlying add_metadata() function vs add_post_meta()
 			 * to ensure metadata is added to the revision post and not its parent.