diff --git a/src/computed.js b/src/computed.js
index 9834ac0..5e396cc 100644
--- a/src/computed.js
+++ b/src/computed.js
@@ -1,8 +1,8 @@
 export function computed(fn, dependencies = []) {
 	const subscribers = new Set();
 	const dependents = new Set();
-	let val = undefined;
 	let isDirty = true;
+	let val;
 
 	function _computedDirtyReporter() {
 		if (!isDirty) {