diff --git a/docs/src/gen-docs.js b/docs/src/gen-docs.js
index b05569dd0f88..992c45279c30 100755
--- a/docs/src/gen-docs.js
+++ b/docs/src/gen-docs.js
@@ -32,7 +32,7 @@ writer.makeDir('build/docs/', true).then(function() {
   });
 }).then(function printStats() {
   console.log('DONE. Generated ' + docs.length + ' pages in ' + (now()-start) + 'ms.' );
-});
+}).done();
 
 
 function writeTheRest(writesFuture) {