diff --git a/src/windows/PrinterProxy.js b/src/windows/PrinterProxy.js
index c42e8de..e0fa74c 100644
--- a/src/windows/PrinterProxy.js
+++ b/src/windows/PrinterProxy.js
@@ -151,7 +151,7 @@ exports.onPrintTaskRequested = function (event) {
     } catch (e) {}
 
     task.oncompleted = function (e) {
-        exports._func(e.detail[0].completion == 3);
+        exports._func(e.detail[0].completion === 3);
     };
 };