diff --git a/types/htmlbars-inline-precompile/htmlbars-inline-precompile-tests.ts b/types/htmlbars-inline-precompile/htmlbars-inline-precompile-tests.ts
index 3a8d722db6..c8adb26d1a 100644
--- a/types/htmlbars-inline-precompile/htmlbars-inline-precompile-tests.ts
+++ b/types/htmlbars-inline-precompile/htmlbars-inline-precompile-tests.ts
@@ -1,5 +1,5 @@
 import hbs from 'htmlbars-inline-precompile';
 
-const likeThisDotRender = (s: string | Array<string>) => {};
+const likeThisDotRender = (s: string | string[]) => {};
 
 likeThisDotRender(hbs`this is allowed`);
diff --git a/types/htmlbars-inline-precompile/index.d.ts b/types/htmlbars-inline-precompile/index.d.ts
index db03d2fad1..21bbe63545 100644
--- a/types/htmlbars-inline-precompile/index.d.ts
+++ b/types/htmlbars-inline-precompile/index.d.ts
@@ -13,4 +13,4 @@
 // [Babel plugin]: https://github.com/ember-cli/babel-plugin-htmlbars-inline-precompile#babel-plugin-htmlbars-inline-precompile-
 // [output]: https://github.com/emberjs/ember-test-helpers/blob/77f9a53da9d8c19a85b3122788caadbcc59274c2/lib/ember-test-helpers/-legacy-overrides.js#L17-L42
 
-export default function hbs(tagged: TemplateStringsArray): string | Array<string>;
+export default function hbs(tagged: TemplateStringsArray): string | string[];