Index: build/chrome/cackey.js
==================================================================
--- build/chrome/cackey.js
+++ build/chrome/cackey.js
@@ -409,11 +409,11 @@
 
 	if (GoogleSmartCard.IS_DEBUG_BUILD) {
 		console.log("[cackey] Asked to provide a list of certificates -- throwing that request over to the NaCl side... ");
 	}
 
-	callbackId = cackeyOutstandingCallbackCounter + 1;
+	callbackId = ++cackeyOutstandingCallbackCounter;
 
 	cackeyInitPCSC(function() {
 		cackeyHandle.postMessage(
 			{
 				'target': "cackey",
@@ -420,11 +420,10 @@
 				'command': "listcertificates",
 				'id': callbackId
 			}
 		);
 
-		cackeyOutstandingCallbackCounter = callbackId;
 		cackeyOutstandingCallbacks[callbackId] = chromeCallback;
 
 		if (GoogleSmartCard.IS_DEBUG_BUILD) {
 			console.log("[cackey] Thrown.");
 		}
@@ -441,11 +440,11 @@
 
 	if (GoogleSmartCard.IS_DEBUG_BUILD) {
 		console.log("[cackey] Asked to provide a list of readers -- throwing that request over to the NaCl side... ");
 	}
 
-	callbackId = cackeyOutstandingCallbackCounter + 1;
+	callbackId = ++cackeyOutstandingCallbackCounter;
 
 	cackeyInitPCSC(function() {
 		cackeyHandle.postMessage(
 			{
 				'target': "cackey",
@@ -452,11 +451,10 @@
 				'command': "listreaders",
 				'id': callbackId
 			}
 		);
 
-		cackeyOutstandingCallbackCounter = callbackId;
 		cackeyOutstandingCallbacks[callbackId] = chromeCallback;
 
 		if (GoogleSmartCard.IS_DEBUG_BUILD) {
 			console.log("[cackey] Thrown.");
 		}
@@ -503,11 +501,11 @@
 
 	if (GoogleSmartCard.IS_DEBUG_BUILD) {
 		console.log("[cackey] Asked to sign a message -- throwing that request over to the NaCl side... ");
 	}
 
-	callbackId = cackeyOutstandingCallbackCounter + 1;
+	callbackId = ++cackeyOutstandingCallbackCounter;
 
 	command = {
 		'target': "cackey",
 		'command': "sign",
 		'id': callbackId,
@@ -524,11 +522,10 @@
 	}
 
 	cackeyInitPCSC(function() {
 		cackeyHandle.postMessage(command);
 
-		cackeyOutstandingCallbackCounter = callbackId;
 		cackeyOutstandingCallbacks[callbackId] = chromeCallback;
 
 		if (GoogleSmartCard.IS_DEBUG_BUILD) {
 			console.log("[cackey] Thrown.");
 		}