diff --git a/.gitignore b/.gitignore
index 71c1dad10b..380e562b06 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@ node_modules
 /internal.*
 /store.js
 /easing.js
+/motion.js
 /transition.js
 /scratch/
 /coverage/
diff --git a/rollup.config.js b/rollup.config.js
index 7e1947ec4e..f0546fceb2 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -68,7 +68,7 @@ export default [
 	},
 
 	// runtime API
-	...['index', 'store', 'easing', 'transition'].map(name => ({
+	...['index', 'store', 'easing', 'motion', 'transition'].map(name => ({
 		input: `${name}.mjs`,
 		output: {
 			file: `${name}.js`,