diff --git a/wp-includes/js/media-editor.js b/wp-includes/js/media-editor.js
index 739747cb67..34777677e6 100644
--- a/wp-includes/js/media-editor.js
+++ b/wp-includes/js/media-editor.js
@@ -556,7 +556,7 @@
 				options = {
 					id:           attachment.id,
 					post_content: attachment.description,
-					post_excerpt: caption,
+					post_excerpt: caption
 				};
 
 				if ( props.linkUrl )