diff --git a/packages/compiler/src/aot/static_reflector.ts b/packages/compiler/src/aot/static_reflector.ts
index 1bb58fb4e4..1514f066d2 100644
--- a/packages/compiler/src/aot/static_reflector.ts
+++ b/packages/compiler/src/aot/static_reflector.ts
@@ -575,7 +575,7 @@ export class StaticReflector implements CompileReflector {
         if (isPrimitive(expression)) {
           return expression;
         }
-        if (expression instanceof Array) {
+        if (Array.isArray(expression)) {
           const result: any[] = [];
           for (const item of (<any>expression)) {
             // Check for a spread expression
diff --git a/packages/compiler/src/util.ts b/packages/compiler/src/util.ts
index e0e5c1d11a..01819f7225 100644
--- a/packages/compiler/src/util.ts
+++ b/packages/compiler/src/util.ts
@@ -168,7 +168,7 @@ export function stringify(token: any): string {
     return token;
   }
 
-  if (token instanceof Array) {
+  if (Array.isArray(token)) {
     return '[' + token.map(stringify).join(', ') + ']';
   }