diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 7ee012c6cf0..c391560befd 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -642,7 +642,10 @@ namespace ts {
             };
         }
 
-        if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
             return getWScriptSystem();
         }
         else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
@@ -650,9 +653,6 @@ namespace ts {
             // process.browser check excludes webpack and browserify
             return getNodeSystem();
         }
-        else if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
         else {
             return undefined; // Unsupported host
         }