diff --git a/packages/elements/src/create-custom-element.ts b/packages/elements/src/create-custom-element.ts
index 53b55890fe..d4c429cab6 100644
--- a/packages/elements/src/create-custom-element.ts
+++ b/packages/elements/src/create-custom-element.ts
@@ -213,7 +213,11 @@ export function createCustomElement<P>(
   // compliance with the spec). This breaks emulated inheritance in ES5 on environments that do not
   // natively support `Object.setPrototypeOf()` (such as IE 9-10).
   // Update the property descriptor of `NgElementImpl#ngElementStrategy` to make it enumerable.
-  Object.defineProperty(NgElementImpl.prototype, 'ngElementStrategy', {enumerable: true});
+  // The below 'const', shouldn't be needed but currently this breaks build-optimizer
+  // Build-optimizer currently uses TypeScript 3.6 which is unable to resolve an 'accessor'
+  // in 'getTypeOfVariableOrParameterOrPropertyWorker'.
+  const getterName = 'ngElementStrategy';
+  Object.defineProperty(NgElementImpl.prototype, getterName, {enumerable: true});
 
   // Add getters and setters to the prototype for each property input.
   defineInputGettersSetters(inputs, NgElementImpl.prototype);