diff --git a/lib/index.js b/lib/index.js
index 3e87b77..308ef28 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -120,7 +120,7 @@ export default class Now extends EventEmitter {
   }
 
   get syncAmount () {
-    if (this._syncAmount) {
+    if (!this._syncAmount) {
       this._syncAmount = this._missing
       .map((sha) => Buffer.byteLength(this._files.get(sha).data))
       .reduce((a, b) => a + b, 0);