diff --git a/wp-includes/js/media-views.js b/wp-includes/js/media-views.js
index f21920f184..584fbc3c28 100644
--- a/wp-includes/js/media-views.js
+++ b/wp-includes/js/media-views.js
@@ -2428,6 +2428,11 @@
 				var requires = button.options.requires,
 					disabled = false;
 
+				// Prevent insertion of attachments if any of them are still uploading
+				disabled = _.some( selection.models, function( attachment ) {
+					return attachment.get('uploading') === true;
+				});
+
 				if ( requires.selection && selection && ! selection.length )
 					disabled = true;
 				else if ( requires.library && library && ! library.length )