diff --git a/Makefile b/Makefile
index 1d1fc08449..9da4b87977 100644
--- a/Makefile
+++ b/Makefile
@@ -93,6 +93,7 @@ publish:
 publish-runtime:
 	cd packages; \
 	node build-runtime.js; \
+	cd 6to5-runtime; \
 	npm publish
 
 publish-core: